[popcornmix]

Here's a link to a file, but any 720p source (live or recorded) should do it. Played back through the Videos section of kodi, it does the same thing. That seems to indicate a problem with DVDPlayer itself and not the MythTV addon or backend. The problem first appeard in 0822b and applies to 0823 as well.
https://www.dropbox.com/s/t3sag5bum3v8xbs/720p.mpg?dl=0

Can't say I see the problem with this clip. It's only 9 seconds long which is a bit short for analysing.
What exactly do you see when you play the clip?