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HTML5 `<video>` Element with Multiple Source Formats Not Fallbacking Correctly in Firefox

👀 Views: 17 đŸ’Ŧ Answers: 1 📅 Created: 2025-07-03
html video firefox html5 HTML

I'm relatively new to this, so bear with me. This might be a silly question, but I'm trying to implement a responsive video player using the HTML5 `<video>` element that supports both MP4 and WebM formats... My current setup looks like this: ```html <video controls width="600"> <source src="video.mp4" type="video/mp4"> <source src="video.webm" type="video/webm"> Your browser does not support the video tag. </video> ``` I've tested this on Chrome, and it works perfectly. However, when I test it in Firefox, the video does not play at all, and I don't even see the fallback message. Instead, I get the following behavior in the console: ``` behavior: The media playback was aborted due to a corruption question or because the media used features your browser did not support. ``` I've checked the video files, and they are encoded correctly without corruption. Additionally, I ensured that the MIME types are correctly set up on my server. The `Content-Type` headers for both formats are: - For MP4: `video/mp4` - For WebM: `video/webm` To rule out any caching issues, I also cleared the cache in Firefox and tried accessing it in a private window, but the scenario continues. Is there something specific I might be missing in terms of compatibility or encoding? Are there best practices for serving multiple video formats that I should consider? Any insights would be appreciated! For context: I'm using Html on Ubuntu. What am I doing wrong? This is part of a larger web app I'm building. Thanks in advance! I recently upgraded to Html 3.11. Any ideas what could be causing this?