Just realized, as I don’t usually have it enabled, that if I have this option enabled and start a movie, after a preview of maybe two or more, I get every 15/20 minutes 10/20 seconds, sometimes more, of very stuttery video but without it stopping entirely and then it continues normal. If I have this option disabled video streams perfectly.
This seems like some sort of memory leak as the video preview option should release the used memory after the video begins.