Videos

![alt(Product demonstration video)](video.mov)

# Inline Videos

![inline alt(Product demonstration video)](video.mov)

# YouTube Embeds!

![alt(Product demonstration video)](https://www.youtube.com/watch?v=ekz6i58kVpI)

You can also use URL parameters like `?t=30s` to specify a start time for the clip.

YouTube creators can disable playback outside YouTube for individual videos. When a video cannot be embedded in Deckset, it remains on the slide with an explanation and an Open on YouTube button. A thumbnail wrapped in a Markdown link remains a link; it does not create an embedded player.

See HTML Export for the separate browser and hosting requirements for exported YouTube embeds.

Start Time Offsets

Start offsets also work for local video and audio files, not just YouTube embeds.

![alt(Product demonstration video)](video.mov?t=30s)

You can use seconds directly or combine hours, minutes, and seconds, for example 45, 90s, 1m30s, or 1h2m3s.

![left alt(Product demonstration video)](video.mov)

# Video Layout Control

Use the same layout modifiers as with images to control the positioning of videos.

- `left` and `right`
- `fit` and `fill`
- Percentage sizing, e.g. `50%`
- `hide` to hide the video. Audio will play regardless.

![right autoplay mute alt(Product demonstration video)](video.mov)

Video Playback Control

Add playback directives after the filename to tweak how the clip behaves:

• autoplay — start the video automatically when the slide appears.
• loop — replay the video continuously.
• mute — silence the audio track.

Mix and match them as needed:

![right autoplay mute alt(Product demonstration video)](video.mov)

Automatic slide advancement

You can add autoadvance to the modifiers to jump to the next slide as soon as the video finishes:

![autoadvance alt(Product demonstration video)](video.mov)

This only works for the last video on the slide and the slide cannot contain build lists.

Control Video While Presenting

On macOS, press k in Presentation Mode to play or pause the current video. The media Play/Pause key provides the same control.

Use alt(...) to give an informative video a useful description, or mark a purely decorative clip with decorative. See Accessible Media. Obsidian-style video links are covered in Obsidian Media Embeds.