Video plugin: External video source gives errors

Problem Description

External URLs to .mp4-files either don't play or give javascript errors.

Attach a Capx

https://dl.dropboxusercontent.com/u/315826/video-error.capx

Description of Capx

Click "Load" to set H.264 source in the Video plugin to the external .mp4-file. Click "Play" to play video.

Steps to Reproduce Bug

• Click "Load"
• Click "Play"

Observed Result

Desktop:

• In IE11: Only the sound plays.
• In Chrome: Nothing happens. The console logs this error: "video_plugin.js:113 Uncaught (in promise) DOMException: The element has no supported sources."
• In Edge: Nothing happens

Mobile:

• In Chrome: Video plays as expected. But afterwards it throws this error: https://dl.dropboxusercontent.com/u/315826/video-error.PNG
• In Safari: Video plays as expected.

Expected Result

The video should just play. The file sits on my own server with CORS headers

Affected Browsers

• Chrome - desktop: (YES)
• Chrome - mobile: (YES)
• Internet Explorer: (YES)
• Microsoft Edge: (YES)
• Safari - mobile: (NO)

Operating System and Service Pack

Desktop: Microsoft Windows 10 Home

Mobile: iOS 10.1.1

Construct 2 Version ID

239.

The server's response headers don't include Access-Control-Allow-Origin (despite what you say), so this is probably just a CORS issue. You also need at least one other codec to guarantee all browsers can play it. The JS error in your screenshot references a function which is definitely not part of C2, so I'd check your browser addons, they may be interfering. Closing as won't fix.