Increase Video Preview Length
Increase from 3.5 hours to 5 hours.
Andrew Strachan commented
Or perhaps at the least show the user a warning when the preview stops that they need to download to watch the rest of the video. (or an option to disable preview for videos longer than 3.5?)
Right now it stops at 3.5hrs, and the user has no idea that the file is longer and they can just download it.