How can I make a responsive video autoplay and loop in Webflow, even on mobile devices?

To make a responsive video autoplay and loop in Webflow, including on mobile devices, follow these steps:

1. Use a Hosted Video File (Not YouTube)

• YouTube and Vimeo don’t autoplay reliably on mobile due to browser restrictions and dependency on user interaction.
• Upload your .mp4 file to a video hosting service (e.g., AWS S3, Bunny.net, or any CDN) or use Webflow’s Assets panel (limited to 10MB max per file).
• External hosting is preferred for larger files.

2. Embed a Responsive HTML5 Video Element

• In Webflow, drag an Embed element into your layout.

• Add an HTML5 <video> element with these attributes:
  autoplay, loop, muted, playsinline, and controls (optional).

• Example of what to include inside the Embed element:

  <video src="https://yourdomain.com/video.mp4" autoplay loop muted playsinline style="width:100%; height:auto;"></video>

• muted and playsinline are critical for autoplay to work on mobile browsers like iOS Safari.

3. Ensure the Video Is Responsive

• In your style attribute or Webflow’s CSS, use:
• width: 100%
• height: auto
• This keeps the video’s aspect ratio and allows it to scale with the container.

4. Optimize the Video for Web

• Convert the file to modern formats like .mp4 (H.264) for broad compatibility.
• Compress it to reduce load time (use tools like HandBrake or ffmpeg).
• Keep file size as small as possible for mobile performance.

5. Test Mobile Autoplay Behavior

• Make sure the video is muted—this is required for mobile autoplay.
• Test on real devices, not just browser emulators, especially on iOS and Android browsers.

Summary

To autoplay and loop a responsive video on mobile, host the video externally, use an HTML5 <video> tag with autoplay, loop, muted, and playsinline attributes in a Webflow Embed, and style it with 100% width. Mobile autoplay works only on muted videos with proper formatting.