Cutscenes are really slow and choppy in every single game

[GuyM81]

No matter what game I play, gamecube or wii, the opening cutscene is incredibly slow and drops a bunch of frames. Sometimes the cutscenes start out okay, but after a few seconds start lagging hard. However, when I get to gameplay it runs perfectly fine. I have no idea what to do. I am using the latest dev build as of the time of making this post.