I don't do power cleans so I really can't give any good advice.
For your hang clean, are you using your arms at all? The reps look a little slow, and I was thinking you could be reverse curling it somewhat. Also, it looks like you are starting out a little low for the hang position (i.e. below your knee). I guess you can do them from that range if you are using the hang cleans as a progression for a full power clean, but I think a "cleaner" hang clean is done with the bar above the knees.