support more file types

[midzer]

Hi,

great project, working pretty smoothly for me!

Here's a small PR to check for supported file types more verbosely:

• support AV1
• support 3gp
• support wmv
• support mkv properly (video/x-matroska not working for me, canPlayType returns an empty string)

With those changes I can even play H265 files with latest https://thorium.rocks/ browser (release with H265 support released soon).

I got the respective codec information from https://tools.woolyss.com/html5-audio-video-tester/

Thanks and have a nice week midzer

[midzer]

Your proposed types look good. Will definitely try them once they're in main branch.

Should I update my PR or do you commit?