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<video> in Superhuman

Not supported <video> is not supported in Superhuman.

Works in 3 of 21 · partial in 2 · not supported in 16

Which clients
Works
Outlook for Mac, Apple Mail, Thunderbird
Partial
Apple Mail iOS, Samsung Mail
Not supported
Gmail, Gmail Android, Gmail iOS, Outlook 365, Outlook (New), Outlook Classic, Outlook iOS, Outlook Android, Yahoo Mail, Yahoo Mail Android, Yahoo Mail iOS, HEY Mail, Proton Mail, AOL Mail, Fastmail, Superhuman

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

The fix for Superhuman

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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What Superhuman does with <video>

@emailens/engine 0.18.22 on the original code

Superhuman does not support <video> elements.

Your next question

Every feature in Superhuman · <video> in every client

Questions

How many email clients support <video>?
It works in 3 of 21, partial in 2, not supported in 16.
What do I use instead of <video> in Superhuman?
Replace video with animated GIF or linked thumbnail.

To see what else in your email Superhuman does not support, paste the whole email.

The checker needs a computer screen.

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