Improve video information on select, warn on HDR content

[emilk]

What

• Uses Add helper functions for codec string and bit depth re_mp4#10

Improves the video blob info in two ways:

• Adds bit depth (if known)
• Shows human-redable name of codec (e.g. AV1 or H.264)

A warning will also be printed if trying to decode a HDR video (since we don't yet support that).

Related:

• Support HDR video (shows wrong color or glitches today) #7594

Checklist

• I have read and agree to Contributor Guide and the Code of Conduct
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[Wumpf]

neat!