I'm trying to play an 8GB 1080p MKV video file on my Macbook (see sig) using the VLC video player, but the video comes out very choppy. I've been downloading this video for about a month now and I really want to watch it. What can I do to make it playable? I already checked "hurry up" in VLC's preferences, but it didn't help anything. Maybe I can use a better video player? Or somehow decrease the video quality using some video editing/converting software?