The links are correct in theory and that’s what I use. And it does work perfectly fine here and for other users, the media key reach Yatse.
In your case they don’t and the logcat shows strange things that happens outside of Yatse 
Please provide new logcat without VLC installed maybe there will be something else.
And as said I do use the very latest Google libraries that none of those do use yet.
I’m referring to the log that says:
NewAvrcpMediaPlayerWrapper: org.leetzone.android.yatsewidgetfree: Controller for org.leetzone.android.yatsewidgetfree maybe is not activated.
Looking at that logcat messages on Google does not return anything so I don’t really understand here and error does not reach Yatse so it’s impossible to do a lot without being able to reproduce