How does Jellyfin-web determine what content a client is capable of playing?

[kimbo]

I went ahead and forced hevc & aac on the webm container list (by editing main.jellyfin.bundle.js), figured it wouldnt work if its not being done by default... to my surprise this does work

So, why doesnt jellyfin add hevc to the webm container in DirectPlayProfiles? Seems odd that the client chooses the profile with the least number of supported codecs