Short Background Story: I am right handed and I play right handed. However, I developed bad golfer's elbow (inner tennis elbow) about 9 months ago and like an idiot I played through it and hurt it to a point that it's chronic. The golfer's elbow DEFINITELY developed because of my serve. Because of this, I started serving with my left arm and tried to concentrate more on proper form so I wouldn't develop the injury again. However, after about a month of serving with my left arm, I am starting to feel the same "golfer's elbow" pain in my left arm now too.
I only really feel the pain when I start to serve the ball harder.
I have uploaded some videos on YouTube of me serving in slow motion. If any of you can check out the videos and offer some suggestions as to WHY the golfer's elbow is starting to affect my left arm I would be VERY appreciative. I know it has something to do with my form but I can't troubleshoot the problem. I would visit a pro, but I am living in Vietnam now and there is nobody available to help here.
Thanks in advance, here are the videos: