It seems like the program wants to crash anytime the Video Preview is held up in some sort of loading, like maybe the video looks to be trying to preview what I've been playing, and it isn't (black or frozen), so in turn I try to play another part of the video, and when I press play, it freezes, until I End Task it. Anyone know what's up? Same thing happens when I do different tricks where I try to play the video, and then skip to another part and press play. Something weird event that happens when the program gets too conjunctive. This happens at least 10 times in my 20 minute videos. Any help? Does Vegas 17 fix all crashing issues with 4k footage? Help!