How many email clients support ?

It works in 3 of 21, partial in 2, not supported in 16.

Does work in Apple Mail?

works in Apple Mail. Closest to Thunderbird: Apple Mail, which agrees on 219 of the 261 features both are tested on.

<video> in Thunderbird

Works <video> works in Thunderbird.

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

The fix for the clients that need it

Needed in 18 of 21: Gmail, Gmail Android, Gmail iOS and 15 more.

Replace video with animated GIF or linked thumbnail

instead

5 lines

<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

3 lines

<video width="600" autoplay muted>
  <source src="demo.mp4" type="video/mp4">
</video>

A free account opens all 21 clients and keeps your checks for 7 days. Create a free account →

Your next question

Every feature in Thunderbird · <video> in every client

Questions

How many email clients support <video>?: It works in 3 of 21, partial in 2, not supported in 16.
Does <video> work in Apple Mail?: <video> works in Apple Mail. Closest to Thunderbird: Apple Mail, which agrees on 219 of the 261 features both are tested on.

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

Check your email, free

No signup · Five clients free, Outlook Classic included · All 21 with an account

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