Squat form check and knee slide

[adnscmplx]

I'm having aching pain in the front of my hip joint after squatting. I've had problems with knee slide for a while and am thinking that is to blame this time as well. I took some videos from two different sessions (orange shirt is one week after the purple). I see some knee slide but wanted to see what others think.

These are all from texas method volume day, 315 x5:

Purple:

http://youtu.be/0YqVZKn7TJw

Orange:

Lateral
http://youtu.be/2Y8vQIZIGLo
http://youtu.be/haZhxw5hJwE

Posterior
http://youtu.be/IoYtNxpnJqk
http://youtu.be/jt57UmxjQaY

I was messing around with my form the other day and hurt my back (probably by hyperextending) so I'm taking a week off to let that and my (fairly mild) hip flexor tendonitis cool off. I re-read the portion of the book about knee control and start by looking straight down at my knees and feet with the bar, slowly adding weight like it suggests.

Any other advice would be appreciated.

[Tom Campitelli]

You are generally too upright and letting your knees travel too far forward and letting them slide at the bottom. Your depth looks to be lacking and you are not getting set at the top of every rep. You also posted five videos, one of which is in slow motion. You need to read the sticky.

Lean over more and send your ass back more. Drive your knees out harder. Pause at the top and take a big breath in and get tight. This will probably help with things. If you post a video again, choose ONE from the rear oblique. Post it at normal speed.