I've only looked at it briefly, but from what I've seen your swing looks pretty solid. The most noticeable thing I see is the hip sway/lateral movement away from the ball on the backswing.
Other than that, it looks pretty good. Your club looks to be in a good position at the top of the backswing, and you seem to maintain your spine angle well in your downswing. To quote Tom Watson, being able to maintain the spine angle is a key to playing good golf. It's one of his swing "secrets".
As for the camera issue having to balance it your your putter, try something like this which is a universal clip-mount holder for iPhones, Ipods, small cameras, etc.:
I bought one of these and it clips onto my golf bag nicely. The metal clip-mount is very strong and the metal gooseneck is resistant to bending, so it'll stay at the angle you bend it. The holder clamp for your device itself swivels on a ball joint and can be adjusted. The gooseneck is 72cm in length, or a little over 2 feet. I bought one because I film with my iPod.
I found this the other day, which could be useful as well, but only if you have an iPhone or iPod, as that is what it is made for. It's a minimalistic holder that clips onto an alignment stick. Both links are the same holder, just the first one includes a collapseable alignment stick for you to use if you don't have one.
I hope this helps you so you can record some more swings. Good luck with your swing!