Elodie not recognizing videos with the .mkv file extension

[Cedric-Boucher]

I would have expected it to import them the same way it imports .mp4 files

[Cedric-Boucher]

I have simply added ".mkv" to the list of valid video extensions at the top of the video.py file, and that seems to have worked. Could someone add this to the main branch?

[Cedric-Boucher]

other file extensions added in #461: mp3, opus, ogg, flac, webm, webp, svg