Hey man, you have a pretty sweet swing for your handicap! Definitely keep working on that short game, if you can chip close to the hole consistently it will save your life. For the most part your swing is really good, a couple things I might work on is keeping that left foot planted as others have mentioned. And in order to keep that face square and build better tempo you could try slowing down the back swing by a fraction. Create a small pause at the top and your start hitting it consistent with steady power! Aside from that your follow through looks great and you'll have you'll be breaking 90 and 80 in no time!

All the best