I did some more digging and went in to my MacBook Pro Display settings. Under “settings, displays, presets” and it seems to make a difference. Not sure why VLC is not choppy with default settings but you might give that a try. I went to “Apple Display (P3-600 nits) and while it’s not totally smooth ...

I have same problem. Apple M4 Pro Tahoe 26.1. HDHomeRun App Video is choppy. VLC player on same turner same channel NOT choppy. What is the fix here? Does the app have a bug?