I've watched your video a few times now and I thought I'd give my thoughts for improvements, many of which are duplications from previous responses. I also think it is great that you posted the video and are open to peer review and that the community had been supportive. I love mmaforum.com
1.) Never lock your knees, that is more important than anything else. I'd rather you get knocked out than have your knee ruined for life.
2.) Hands up all times, especially when throwing punches and kicks. Right now you are a counter-striker's wet dream.
3.) Remove the double-jab from your arsenal for a while. That double jab will get chased back with an overhand right that will put you down/out. Watch the Jens Pulver/John Lewis fight for a good example of what I'm talking about.
4.) Fight relaxed, you generate decent power for as much as you fight your own body. When you relax you'll find rolling your hips and whipping your kicks is what makes kicks so deadly.
5.) Use your whole body to punch and kick when you are power training, watch some videos online discussing kinetic linking.
6.) Practice a bit more in combination chaining and striking from varying ranges to simulate a real opponent.
7.) Add some defense to heavy bag training, roll/slide and counter even on a heavy bag.
8.) Work angles a bit more, and circling to the right to open up target areas.
10.) Improve your flexibility, let the resistance be your opponents body and not your own.
11.) Knees strikes look pretty foreign to you, go grab a soccer ball and do some knee juggling and do runner's stretching to maximize delivery of knee strikes. Another good exercise is jogging with 'high knees'.
13.) Chopping kicks for low/mid kicks, kicks at a downward angle to the sciatic nerve is another human reset button.
12.) You look like you are having fun and have the right attitude. Keep up the good work, keep posting vids, and keep an open mind!