# Videos in help pages

> Verified against the product on 2026-10-12

## Video sources

Help pages can include videos from YouTube, Vimeo, or Bilibili, as well as clips hosted at an HTTPS address.

| Source | ID or address and playback |
| --- | --- |
| YouTube | An 11-character video ID; plays in YouTube’s privacy-enhanced player |
| Vimeo | A numeric ID of 1 to 12 digits; plays in Vimeo’s player with Do Not Track enabled |
| Bilibili | A BV ID starting with `BV1` followed by nine more characters; plays in Bilibili’s player without autoplay |
| Hosted clip | An HTTPS address; plays in the browser’s video player |

Cactus checks provider IDs before playback. An invalid ID or a hosted clip address that isn’t HTTPS produces no video.

## Watch videos

You can play help-page videos in Cactus’s Docs, the Help Center, and Messenger. In Messenger, a video appears in the page section that contains it, using the same player as web help pages and Docs.

- Provider videos play in the provider’s player, which loads when its section is near the screen.
- Hosted clips use the browser’s player with playback controls. The clip isn’t fetched until you play it.
- A hosted clip can have an optional poster image. It must use an HTTPS address and appears before playback.
- A video’s caption is its own title. When it has a title, the caption appears under the video; without a title, there’s no caption.

## Markdown versions

In a Markdown help page, each video is a link to where it plays. The link uses the video’s caption as its text; without a caption, Markdown shows the bare address in angle brackets. Provider videos link to their provider’s watch page. If a video can’t play because its ID or address is invalid, it produces no Markdown output.