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HTML element · data last changed 10 Nov 2026

<video> in email clients

Works in 3 of 21. Not supported in Gmail, Gmail Android, Gmail iOS and 13 more. Partial in Apple Mail iOS and Samsung Mail.

Your reader in Outlook Classic sees the email without <video>, even if it looks right where you tested it.

caniemail (MIT) via @emailens/engine 0.18.22

The fix for Outlook Classic

Replace video with animated GIF or linked thumbnail

after 
<a href="https://example.com/watch" target="_blank">
  <img src="https://example.com/video-thumb.gif"
    width="600" alt="Watch the video"
    style="display: block; border: 0; max-width: 100%;" />
</a>
Show the original
before 
<video width="600" autoplay muted>
  <source src="demo.mp4" type="video/mp4">
</video>

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<video> is not among the 24 features we have screenshotted on real installs. The ones we have →

All 21 clients, problems first

ClientSupport
Gmail Not supported See caveat 1
Gmail Android Not supported See caveat 1
Gmail iOS Not supported See caveat 1
Outlook 365 Not supported See caveat 2
Outlook (New) Not supported See caveat 2
Outlook Classic Not supported
Outlook iOS Not supported See caveat 2
Outlook Android Not supported See caveat 2
Yahoo Mail Not supported See caveat 5
Yahoo Mail Android Not supported See caveat 5
Yahoo Mail iOS Not supported See caveat 5
HEY Mail Not supported
Proton Mail Not supported See caveat 7
AOL Mail Not supported See caveat 5
Fastmail Not supported See caveat 8
Superhuman Not supported
Apple Mail iOS Partial See caveat 4
Samsung Mail Partial See caveat 6
Outlook for Mac Works See caveat 3
Apple Mail Works
Thunderbird Works

Caveats (8)

  1. 1. Gmail, Gmail Android, Gmail iOS: <video>, <source> and <track> tags are replaced by <u></u> tags.
  2. 2. Outlook 365, Outlook (New), Outlook iOS, Outlook Android: The <video> element is supported, but the video can not play due to a strict Content Security Policy.
  3. 3. Outlook for Mac: Partial support. The video can be played by doing a right click and play. But autoplay and controls are not supported.
  4. 4. Apple Mail iOS: Partial support. Requires the controls attribute to play. Partial support. autoplay is not supported.
  5. 5. Yahoo Mail, Yahoo Mail Android, Yahoo Mail iOS, AOL Mail: <video>, <source> and <track> tags are stripped. The fallback content is shown instead.
  6. 6. Samsung Mail: Partial support. Requires the controls attribute to play.
  7. 7. Proton Mail: The <video> element is supported and the poster image is visible, but the video can not play due to a strict Content Security Policy.
  8. 8. Fastmail: Not supported. The <video> element and all its content is removed.

Caveats as recorded by caniemail (MIT), one entry per wording.

Your next question

<video> in Outlook Classic · Every feature in Outlook Classic · All email CSS features · What real installs show

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caniemail (MIT) via @emailens/engine 0.18.22 · tested upstream 16 Sep 2019 · data last changed 10 Nov 2026 · Outlook (New) cells are the engine's mapping