It just looks like you're bumping the bar out a little on the extension.
Try to stay flat footed longer before initiating the second pull. You're just coming up on the toes too soon.
Immediately after your extension, let your elbows break up and out as you pull under the bar.
Also as you receive the bar, try to keep your head and chest up and sit straight down. It just looks like you're "diving" through the bar a little bit.
But all around, you look like you move well for having no coaching.