How game streaming works: from a console to thousands of viewers

The chain from game to viewer in four steps

Every game stream follows the same basic path:

1. Capture. The game picture and sound are captured. On a PC this happens in software; consoles either use a built-in broadcast feature or send their picture to a computer through a capture card.
2. Mix. Streaming software combines the game with extras: a microphone, perhaps a webcam, on-screen alerts and timers.
3. Encode and upload. The video is compressed into a stream small enough for a home internet connection and sent to the platform's servers.
4. Deliver. The platform re-sends the stream to every viewer, often at several quality levels so people on slower connections can still watch.

Because each step takes a little time, viewers see the action a few seconds after it happens. That delay is why chat messages sometimes react to something the streamer has already moved past.

Viewers do not need any of this equipment. Watching only requires a browser, a phone or tablet app, or a smart TV or console app for the platform, plus a steady internet connection.

Twitch, YouTube and Kick: where gaming streams live

Three platforms account for much of the live gaming audience familiar to UK viewers:

• Twitch is built around live streaming, with chat, channel communities and features like clips and raids. Its terms set a minimum age of 13 and require users under the age of majority to be supervised by a parent or legal guardian.
• YouTube combines live streams with its huge library of uploaded videos. To live stream, YouTube says you need a verified channel and no live-streaming restrictions in the past 90 days.
• Kick is a newer live-streaming platform, operated by Kick Streaming Pty Ltd according to its terms, which prohibit use by under-13s and require parental supervision and consent for under-18s.

Esports organisers and charity marathons often broadcast on more than one platform at once. Speedrun.com also pulls in live streams of speedrunners on its own Streams page.

What the streamer's software is doing

Streaming software is often called an encoder, because its main technical job is encoding: turning raw video into a compressed format. Settings that matter include:

• Resolution and frame rate - for example 1080p at 60 frames per second for fast games.
• Bitrate - how much data per second is sent. Higher looks better but needs a faster upload speed.
• Scenes - preset layouts, such as a starting-soon screen, the main game view and a break screen.

YouTube lists several ways to go live: from a mobile device, from a webcam, through encoder software, or from a console. Mobile live streaming has its own extra requirements: YouTube says your first stream may take up to 24 hours to enable, and channels with fewer than 1,000 subscribers may have the audience of mobile streams limited, with the archived stream set to private by default.

For speedrunners, the software also displays a split timer, and for esports broadcasts a production team adds scoreboards, replays and commentary on top.

Mistakes in these settings are the most common cause of a stream that looks fine to the streamer but stutters for viewers.

Chat: the part that makes it live

The difference between a stream and a video is the audience talking back. Chat runs beside the video and the streamer can read and respond to it in real time.

Because chat is open to the public, streamers have tools to control it. YouTube lets creators set live chat options when setting up a stream and appoint moderators. On Twitch, moderation tools include AutoMod, an automated filter that holds risky messages for review, plus human moderators chosen by the streamer.

For under-18 streamers, YouTube says live streams with minors under 16 who are not visibly accompanied by an adult may be removed or have their live chat disabled. Our guide to clips, VODs and chat covers chat culture, emotes and moderation in more detail.

Delay, quality and why streams sometimes stutter

Streams can buffer or drop quality for two main reasons: the streamer's upload is struggling, or the viewer's download is. Platforms usually offer several quality options, and an "auto" setting that adjusts to the viewer's connection.

Some streamers deliberately add a longer delay. In competitive games this stops opponents from watching the stream to gain information, a practice known as stream sniping. Many esports broadcasts run on a delay for the same reason.

Speedrunners face a related issue: if a stream drops mid-run, the recording on the platform may be incomplete. Speedrun.com's site rules recommend recording locally as well as streaming for exactly this reason.

For viewers, choosing a lower quality setting is the quickest fix for buffering on a slow or busy connection. Fast-moving games tend to look blockier at low bitrates than slower games, which is why streamers of action games often prioritise a stable frame rate over a higher resolution.

How streamers earn money, and what viewers are asked to pay for

Many streams include ways for viewers to spend money, and it helps to recognise them:

• Subscriptions or memberships - monthly payments to a channel, often unlocking emotes or badges.
• Paid chat features - on YouTube these include Super Chat and Super Stickers, which highlight a message in exchange for payment.
• Platform currencies and gifts - Kick's terms, for example, refer to KICKs and Gifts.
• Donations - direct tips, or charity donations during marathons.
• Sponsorships - brand deals the streamer promotes.

None of these are needed to watch. For families, agreeing a clear rule about spending on streams, and checking which payment methods are saved on a child's devices, avoids surprises. Our teen safety guide includes more on this.

After the broadcast: VODs, highlights and clips

When a stream ends, it does not have to disappear. Platforms can store the whole broadcast as a VOD (video on demand), and streamers can cut highlights or upload edited videos.

Viewers can also create clips: short excerpts of a live stream or past broadcast. Twitch's developer documentation says a clip can be from 5 to 60 seconds long, chosen from a window of about 90 seconds of the stream.

Storage limits vary by platform and channel type, so VODs on some services expire after a set time. If a moment matters to you, such as a personal best in a speedrun, keep your own local copy. Our guide to watching live covers how to catch up on events afterwards.