Video plugin: External video source only works on mobile

Problem Description

In the "Set source" action in the Video plugin I want to use an external URL to a .mp4 video file. The file sits on my own server with CORS headers. When I preview on my mobile phone, it works - I can play the video. But the same preview on desktop gives this console error:

video_plugin.js:113 Uncaught (in promise) DOMException: The element has no supported sources.

Operating System and browser

I am testing in Chrome on Windows10. And in Chrome on iOS.

Construct 2 Version ID

Version 239.

It's most likely a browser issue, and perhaps Ashley can make a work around.

That is, if you make a capx that reproduces the issue.

Closing, please see the bug report requirements, and note this is most likely to do with supported codecs in the browser you test, rather than a bug or anything mobile-specific.

It's not a codec issue. If I include the excact same .mp4-file in the project, it plays fine on desctop.