It’s covered in the iframe attributes
|`src`|string|The iframe `src` URL string should be https://player.twitch.tv/ with one of these required query string parameters:
* `channel` – (string) Name of the channel, for a live stream.
* `video` – (string) Video ID (for past broadcasts, highlights, and video uploads). In this context (the video player), the video ID must have a “v” prefix.
* `collection` - (string) Collection ID, for a collection of videos.
If both `video` and `collection` are specified, the specified collection starts playing from the specified video. If the video is not in the collection, `collection` is ignored and the specified video is played.
If `channel` is specified along with `video` and/or `collection` , only `channel` is used.|
| --- | --- |
Could be clearer but the examples cover the three variations
HTTPS is now required