Show supported files and validate URL source while adding audio/video content elements

[mbarisic0]

I'm submitting a...

• Bug report
• Regression (a behavior that used to work and stopped working in a new release)
• Feature request
• Documentation issue or request
• Enhancement

Context

There are no supported formats for audio or video content elements (local upload or URL). According to that, invalid formats can be uploaded via URL and those elements are not reproducible.

Expected Behavior

• Add a list of "Supported formats" in dependence on project/client needs
• Validate URLs while pasting route to audio or video files

Current Behavior

• Supported formats are not displayed
• There is no validation while adding video/audio content elements via URL

Finder filters valid formats and disables all invalid formats while uploading audio or video elements from the local storage

Steps to Reproduce

1. Add Video content element and paste Vimeo URL
2. Add Audio content element and paste YouTube URL

Screenshot