As of November 2026, you still can’t count on HTML5 video playing inside an email. The main clients where it can play are Apple Mail and Samsung Mail. Gmail, Yahoo Mail and Outlook.com (the service that replaced Hotmail) show your fallback image instead. The safe approach today is a <video> element with a linked poster image inside it, or just the linked image with a play button. The bigger change since this post first ran is that video now matters less than the rules mailbox providers set in 2024 and 2025: SPF, DKIM, DMARC, one-click unsubscribe and spam-rate limits decide whether your email reaches the inbox at all.
What Hotmail’s HTML5 video support looked like at the time
When this post first ran, Hotmail (then branded Windows Live Hotmail) had started supporting HTML5 video in email. It was a big step for video in email, but it was far from reliable.
Getting a video to play took several steps. You opened the email, turned images on, then right-clicked the video and chose Play. Hotmail removed the <video> tag’s normal behaviour by default, so the right-click menu was the only way to start playback. Internet Explorer 7 and 8 didn’t support HTML5 video at all, so people reading Hotmail in IE needed fallback content such as an image. Safari didn’t allow right-click playback either, so fallback content was required there too.
All of that is history now. Microsoft replaced Hotmail with Outlook.com in 2012 and 2013, and the old addresses still work on that service. Internet Explorer 11, the last version, was retired on June 15, 2022, and Windows now sends users to Microsoft Edge instead. What hasn’t changed is the main lesson: every video email needs fallback content, because most inboxes still won’t play the video.
Why autoplay video in email is a bad idea
Ros at CampaignMonitor made a good point about autoplay. A video that starts playing by itself in someone’s inbox will annoy most readers, and it’s a quick way to get people to unsubscribe.
That still holds, and the cost is higher now than it was then. Under Google’s sender guidelines, anyone sending more than 5,000 messages a day to Gmail addresses has to keep the spam rate reported in Postmaster Tools below 0.3%, and Google recommends staying under 0.1%. An email that annoys readers doesn’t just lose them. Readers who hit “Report spam” instead of unsubscribing push you toward that limit. If you use video, let people choose to press play, and keep it short and silent by default.
Was video in email worth waiting for
The original prediction was that it would only be a short matter of time before video in email was ready and worth using. That didn’t happen. More than fifteen years later, guides from Campaign Monitor, Email on Acid and Mailtrap still describe support as patchy, and tests summarised on caniemail.com show full support in only a minority of clients.
Even where video does play, it’s less reliable than it used to be. Apple Mail has long been the main client that plays HTML5 video. Some 2026 vendor write-ups say playback has become less dependable in recent Apple Mail versions, though Apple hasn’t published anything about it. So test on current iOS and macOS builds before you plan a campaign around it.
HTML5 video support by email client in 2026
Support has changed little in years. Treat the table below as a planning guide, then check your own audience’s email clients and test before you send.
| Email client | HTML5 <video> behaviour |
What your reader sees |
|---|---|---|
| Apple Mail (iOS, iPadOS, macOS) | Historically plays, reliability now mixed | Video with controls, or your fallback |
| Samsung Mail (Android) | Plays in most guides | Video with controls |
| Outlook for Mac | Partial, sometimes right-click only | Video or fallback |
| Gmail (web and apps) | Strips the video | Fallback image |
| Yahoo Mail and AOL Mail | Strips the video | Fallback image |
| Outlook.com (formerly Hotmail) | Shows fallback | Fallback image |
| Outlook for Windows (classic and new) | No playback | Fallback image |
The pattern is simple. The clients with the most users show your fallback, so the fallback image is what most of your list will actually see. Design it as the main creative, not as a backup.
How to add video to an email today
The approach that works best is to wrap a linked poster image inside a <video> element. Clients that support video play it, and everyone else gets a clickable image that opens the video on a landing page you host.
- Host the video as an MP4 (H.264) file on your own server or CDN. YouTube and Vimeo embeds rely on JavaScript and iframes, which email clients block.
- Create a poster image at your email’s width, with a visible play button and the video length, for example “Watch: 45 seconds”.
- Put the video tag in your email and nest the linked image inside it as the fallback.
- Link the fallback to a landing page where the video plays, so you can track clicks there.
- Test in Apple Mail, Gmail, Outlook.com and Outlook for Windows with Litmus or Email on Acid before sending.
<video width="600" height="338" controls muted playsinline
poster="https://media.example.com/demo-poster.jpg">
<source src="https://media.example.com/demo.mp4" type="video/mp4">
<img src="https://media.example.com/demo-poster-play.jpg"
width="600" height="338" alt="Play the 45-second product demo">
</video>
Some clients remove the <video> element and everything inside it, including the fallback. If your tests show a blank space, use the method many developers rely on: put a standalone linked image in the email, and use a CSS media query that only Apple and Samsung clients recognise to swap in the video for them.
An animated GIF is the other common choice. Most major clients play GIFs, including Outlook for Microsoft 365 on Windows. Older Outlook desktop versions show only the first frame, so put your play button and message in that frame.
Keep video emails within current sender rules
Video can’t get you into the inbox, but sender authentication and list hygiene can. Since February 2024, Gmail and Yahoo require bulk senders to authenticate with SPF and DKIM, publish a DMARC policy, support one-click unsubscribe (RFC 8058) on marketing mail and keep spam complaints low. Since May 5, 2025, Outlook.com has required SPF, DKIM and DMARC for domains sending more than 5,000 messages a day to its consumer addresses, including hotmail.com, live.com and outlook.com.
A minimal DMARC record to start with looks like this:
_dmarc.example.com. TXT "v=DMARC1; p=none; rua=mailto:[email protected]"
The one-click unsubscribe headers on marketing mail look like this:
List-Unsubscribe: <https://www.example.com/unsub?u=abc123>, <mailto:[email protected]>
List-Unsubscribe-Post: List-Unsubscribe=One-Click
Measure video emails by clicks, not opens
Use click-to-play rate on the poster image as your main metric. Opens are a poor guide. Since Apple Mail Privacy Protection launched with iOS 15 in September 2021, Apple Mail preloads images, which inflates open rates. Gmail’s image proxy also hides real image loads. Clicks on the poster and plays on the landing page show real interest.
Also keep your HTML light. Gmail clips messages with more than about 102 KB of HTML and hides the rest behind a “View entire message” link, which can cut off your unsubscribe footer.
FAQ
Can you embed a YouTube video in an email?
No. YouTube and Vimeo players rely on iframes and JavaScript, which every major email client blocks. Use a screenshot of the video with a play button, linked to the YouTube page or your own landing page.
Does Gmail support video in email?
Gmail doesn’t play HTML5 video in the inbox. It removes the <video> element and shows your fallback image. Gmail does show a playable preview for some plain YouTube links, but you can’t control that feature, so don’t plan around it.
Will adding video hurt deliverability?
Video in an email doesn’t trigger spam filters by itself, but large attached files and heavy HTML can cause problems. Never attach the video file. Host it and link to it, keep the HTML under Gmail’s clipping limit and make sure SPF, DKIM and DMARC pass, because those checks matter far more.
Is an animated GIF better than HTML5 video?
For most lists it is, because GIFs play in Gmail, Yahoo Mail, Apple Mail and Outlook.com, while HTML5 video plays in only a few clients. Keep GIFs short and under about 1 MB so they load quickly on mobile data. Older Outlook for Windows versions show only the first frame, so make that frame work on its own.
Do video emails need to follow CAN-SPAM?
Yes. The FTC’s CAN-SPAM rules apply to any commercial email whatever the format. You need accurate header and subject lines, a valid physical postal address and a working opt-out that you honour within 10 business days. Gmail and Yahoo expect one-click unsubscribe requests to be handled within two days.
Does dark mode affect video poster images?
It can. Some clients in dark mode change background colours but leave images alone, so a poster with a white border can look like a glowing box. Use a poster with no border or with a transparent PNG play button, and test it in both light and dark mode.
Sources
- Google Workspace Admin Help: Email sender guidelines
- Google Workspace Admin Help: Email sender guidelines FAQ
- Yahoo Sender Hub: Sender best practices
- Microsoft Tech Community: Strengthening Email Ecosystem, Outlook’s New Requirements for High-Volume Senders
- FTC: CAN-SPAM Act, A Compliance Guide for Business
- Campaign Monitor: HTML5 and Video in Email
- Email on Acid: How to Embed HTML5 Video in Email