Multistreaming 24/7: one broadcast on YouTube, Twitch and Kick
What sending one stream to several platforms actually costs, which platform's rules bind, and why the failure mode nobody warns you about is a platform that goes quiet rather than one that refuses you.
Multistreaming - the platforms call it Simulcasting - is one live broadcast delivered to several destinations at once. The appeal is obvious for a channel that runs around the clock: the same loop that fills a YouTube stream can fill a Twitch one and a Kick one, and none of it costs extra content.
The parts that are not obvious are the three this page is about. What it costs, which is mostly a question of where the copying happens. What the platforms allow, which is a question with one strict answer and several permissive ones. And what happens when one destination stops accepting data without saying so - the failure that takes the rest of the broadcast with it if nothing is arranged to stop it.
How to run one broadcast on several platforms
The mechanics are the same everywhere: collect a destination per platform, then decide where the copying happens.
Collect an ingest address and a key per platform
Each Destination is a pair, and the pairs are not interchangeable.
- YouTube publishes one address for everybody and gives you a key in YouTube Studio. (full walkthrough)
- Twitch publishes a list of ingest servers, any of which works with the key from your Creator Dashboard. (full walkthrough)
- Kick: a host issued per account, so the address from your dashboard is the only one that works. (full walkthrough)
- TikTok, Facebook, Rumble and Telegram each hand out an address with the key - copy both, never one.
Decide where the copy is made
This is the decision that determines what multistreaming costs you.
- On your machine: OBS with a multi-RTMP plugin encodes once and opens one connection per platform. Three destinations at 6,000 kbps is 18 Mbps leaving your house, continuously.
- In the cloud: the video reaches a server once, and the server opens the connections. Your upload carries one stream, or - for pre-recorded content - one file, once.
- The encode itself is only done once either way. What multiplies is the delivery, not the encoding.
- A residential upload is the usual ceiling: 40 Mbps up sounds generous until three destinations and a video call share it.
Set the encoder to the strictest platform
One encode has to satisfy every destination, so the limits intersect.
- H.264 - Kick accepts nothing else, so HEVC and AV1 are out the moment Kick is on the list.
- A fixed 2-second Keyframe Interval: YouTube caps it at 4 seconds and Twitch's transcodes depend on its regularity.
- CBR, and a bitrate under the lowest ceiling among your destinations.
- AAC audio at 128-160 kbps stereo, which every platform in this list accepts.
Protect each destination from the others
The step people skip, and the reason a fan-out fails in a way a single stream never does.
- A muxer that writes to several outputs from one thread blocks on the slowest of them.
- Each output needs permission to fail on its own without ending the broadcast.
- Each output needs a buffer it is allowed to overflow, so a stalled platform drops packets instead of applying back-pressure.
- Without both, a single silent destination is enough to stop everything - see the section below.
Watch each destination separately
"The stream is live" is not a fact about the broadcast, it is a fact about one platform.
- Check viewer counts on each platform, not the encoder's status light.
- A destination that was refused at connect time will not appear in any per-stream statistics.
- Dropped Frames on one destination and not the others point at the route to that ingest.
- Platforms end streams for their own reasons - a copyright match on one does not stop the others.
What a fan-out is doing while it runs
Every multistreaming service works the same way underneath, and the shape of it explains both why the second platform is nearly free and why the whole thing can stop without an error:
- The video is copied, not re-encoded. One encode is made and the same packets are handed to every destination - which is what Fan-out means, and why the third platform costs a fraction of the first.
- Each destination is its own session. Every platform gets a separate connection with its own handshake, its own credentials and its own way of failing, even though they carry identical video.
- Each has to be allowed to fail alone. Without that, one platform refusing the connection ends the broadcast for all of them - the working ones included.
- Each needs a queue it is allowed to overflow. A platform that stops reading without disconnecting will otherwise hold everybody up, and the buffer has to be free to drop what it cannot deliver rather than wait.
The measured cost of each extra destination on our own workers, with the video copied and only the audio re-encoded - the way a looped 24/7 stream actually runs: 9.7% of a core for one destination, 11.9% for two, 13.0% for three. Running the same destinations as separate encoders instead costs 1.9x, because the audio is then encoded once per output. Delivery scales linearly with bandwidth - roughly 2 TB per destination per month at 6,000 kbps running continuously - but the processing barely moves.
What one encode has to satisfy
Multistreaming removes your freedom to tune per platform: the settings become the intersection of every destination's limits. The published numbers are YouTube's, Twitch's, Kick's and Facebook's, and the platform limits table puts them side by side.
- Bitrate: the lowest ceiling wins. Twitch's guideline is 6,000 kbps, Kick's published ceiling is 8,000, YouTube's 1080p60 range runs higher. Pick for Twitch and every other platform is comfortable.
- Codec: H.264. Kick takes nothing else. On a YouTube-only stream you would have other options; the moment a second platform joins, you do not.
- Keyframes: fixed at 2 seconds. Regularity matters more than the number - Transcoding ladders are built on it.
- Resolution and frame rate: one of each. No platform in this class re-renders your stream to a different size for you; whatever you send is what everybody gets.
- Audio: AAC 128-160 kbps. Higher is discarded on most of the platforms it reaches.
The practical answer for almost everyone is 1080p60, H.264, CBR 6,000 kbps, 2-second keyframes, AAC 160 - a single profile that no platform on this page rejects.
What each platform allows
One platform has real rules about this. The rest mostly do not, which means the strict one sets the shape of your whole setup.
- Twitch - the binding one. Its Simulcasting Guidelines apply to every streamer "unless you have an agreement with Twitch that requires exclusivity", and set two conditions: the experience on Twitch must not be degraded relative to the parallel streams - their example is worse video quality on Twitch - and you must not actively encourage Twitch viewers to leave for a concurrent livestream, which they extend to banners, QR codes, broadcast titles, go-live notifications and chat commands. Twitch sends a warning before any enforcement action, and third-party tools that merge activity from several platforms are permitted for personal use.
- YouTube. No exclusivity requirement for live streams. The Watch Hours a stream accumulates on YouTube count toward the YouTube Partner Program (YPP) whether or not the same content is live elsewhere.
- Kick. No published simulcasting restriction of the Twitch kind. Individually contracted creators have their own agreements, which no general guide can speak for.
- TikTok LIVE. Streaming from outside the app needs LIVE access, and TikTok issues the ingest address per streamer rather than publishing one. The follower threshold is usually quoted as 1,000, but TikTok does not state it on a page we could verify - treat that number as hearsay until your own account shows the option.
- Facebook and Rumble. Both issue an address with the key and neither restricts parallel broadcasts; Facebook requires RTMPS rather than plain RTMP, and gates going live at all behind an account 60 days old with 100 followers. (the Facebook walkthrough)
In practice, if your setup satisfies Twitch it satisfies everybody. The one arrangement to avoid on every platform is a chat overlay that merges audiences from several of them onto a Twitch stream.
The failures that only happen when there is more than one destination
A single stream fails loudly. A fan-out has quieter ways to go wrong, and the worst of them looks like nothing at all.
One platform stalls and the whole broadcast stops
The failure nobody warns about. A destination that holds its connection open and stops reading applies back-pressure to everything sharing the same writer, and every other platform starves behind it. We measured a stream dying this way at 51.7 seconds, with no error at all and every destination still reporting itself live.
- Each destination must be allowed to fail on its own without ending the broadcast.
- Each needs its own queue, with permission to drop what it cannot deliver - so a stalled platform loses packets instead of holding everyone up.
- One without the other is not enough: with a queue that may not drop, the same test still died - at 54.8 seconds instead of 51.7.
- A hosted service should be doing both for you. It is worth asking, because nothing looks wrong until the night a platform goes quiet.
One destination never came up and nothing said so
A key rejected at connect time is a per-destination event, and most encoder UIs show one status light for the whole broadcast.
- Check the viewer count on each platform after starting, not the encoder's status.
- Re-copy the key and address as a pair from the platform that is missing.
- A platform that needs its own ingest URL and was not given one is silently skipped by most tools.
- Confirm the account is actually eligible to go live - TikTok and YouTube both gate this.
Dropped frames on one platform only
The encoder is fine; the route to that particular Ingest Server is not.
- Compare per-destination statistics before touching the encoder settings.
- Switch that platform to a different regional ingest if it offers one.
- Lower the shared bitrate - it is the only lever that affects every destination at once.
- If it is always the same platform, it is a routing problem rather than a bandwidth one.
Fan-out is configured but the stream still reaches one platform
Common after enabling multistreaming on a broadcast that was already running.
- A running stream keeps the destinations it started with; the new ones engage on the next start.
- Check the plan's per-broadcast destination allowance before assuming a bug.
- A key whose platform needs its own ingest URL is skipped when that URL is missing.
- Two keys that resolve to the same address are one destination, not two.
The session caps nobody mentions until the stream ends
Two of these platforms end a broadcast on a timer, by themselves, and say so in their own documentation. Facebook stops at 8 hours - desktop, mobile and third-party software alike, with no grace period - and Twitch at 48, which it states cannot be changed. YouTube and Kick impose no comparable limit. So a genuinely 24/7 fan-out is not one session everywhere: it is a permanent stream on some platforms and a loop of restarts on others.
- Expect the ends: three restarts a day for Facebook, one every other day for Twitch.
- Facebook's own advice is a planned break followed by an immediate restart - a persistent stream key is what makes that automatable rather than a reconfiguration.
- Twelve hours on Facebook exists for some partners but is granted case by case by Meta, not switched on.
- The question to ask any streaming tool is not whether it multistreams but whether it restarts a destination that ended on its own.
Multistreaming 24/7 without a machine of your own
For a channel that is meant to be live all the time, the local version compounds every problem it has. The machine has to stay on for months, the connection has to carry N times the bitrate continuously, and any restart takes every platform down at once rather than one.
TheLoops does the fan-out in a datacentre. You upload the videos once, add a key per platform, and one broadcast reaches all of them - with each destination given its own queue and its own permission to fail, because that is the part that decides whether a bad night on one platform is an incident or a footnote.
Destinations per broadcast run 1 on the free plan, 3 on Basic, 6 on Studio and 10 on Pro - so fan-out starts on Basic. The pricing page has the rest of the numbers.
One broadcast, every platform you have a key for
Upload the videos once and let one 24/7 stream reach YouTube, Twitch, Kick and the rest - with each destination isolated from the others.
Multistreaming questions
Yes. Twitch's Simulcasting Guidelines apply to all streamers unless they hold an exclusivity agreement with Twitch, and neither YouTube nor Kick publishes a simulcasting restriction. The two conditions worth remembering are Twitch's: do not let the Twitch broadcast be the worse one, and do not use Twitch to push viewers towards the stream running elsewhere.
It depends entirely on where the copying happens. Multistreaming locally from OBS opens one connection per platform, so three destinations at 6,000 kbps is 18 Mbps leaving your connection continuously. Multistreaming in the cloud sends the video up once and copies it server-side, so your upload carries one stream regardless of how many platforms receive it.
Barely, if it is done properly. The video is copied rather than re-encoded per destination, and only the audio is encoded once for all of them - measured on our own workers, one destination costs 9.7% of a core, two 11.9% and three 13.0%. Running each destination through its own encoder instead costs about 1.9x, because the audio is then encoded once per platform. What scales linearly is bandwidth, not processing: roughly 2 TB per destination per month at 6,000 kbps running around the clock.
Yes - it is the same RTMP session either way, and the platforms cannot tell the difference between a live camera and a looped file. What changes is the operational side: an encoder that must run for months, on a connection that must hold, is the reason 24/7 multistreaming is usually run from a datacentre rather than a desk.
On TheLoops: YouTube, Twitch, Kick, TikTok, Facebook, Rumble, Telegram, and any custom RTMP or RTMPS endpoint. How many at once depends on the plan - 1 on the free plan, 3 on Basic, 6 on Studio, 10 on Pro. Platforms that issue an ingest address per streamer need that address supplied along with the key.