Okay this is what I got from watching the video.
1. Forehand technique is solid, however, her footwork is the problem. She doesn't "meet the ball" as many coaches tell their players. It appears she is pretty flat footed prior to hitting the ball which loses momentum and racket head speed. By meeting the ball, she increases the weight transfer into the shot, takes away time from her opponent and in my opinion, makes her more alert to bad bounces or whatever. But yeah, in some of her forehand shots, you can even see her whole body leaning forward while her feet are planted on the ground. This is not good for balance, and she needs to learn to really move her feet so that she doesn't plant too early. Federer is obviously a top choice to learn from in terms of footwork. Here is an example video - notice how Federer always tries to lean into his shots. Yes, he is sometimes on his backfoot, but they are professionals afterall and you can't expect balls fed to your liking
2. Backhand needs a revamp. I don't know where she would have picked up that habit of finishing the backhand sideways. Backhand has to almost be a golf swing in a way - start low and finish high. In a way, it almost appears she is trying to hit a "windshield-wiper forehand" as a backhand. I mean technically I suppose it could end up working, but really it is best to stick with the basics, plus honestly the shot looks really unnatural and forced, not to mention it seems like it could lead to a lot of mis-hits. Watching David Nalbandian videos is always great, as he is nearly perfect technique on that stroke. In the video I include, notice that "low to high" shot that is like swinging a golf club.
3. The serve is getting there. There aren't many clips for the shot, so I can't say too much, but it looks like it is almost solid. Maybe the biggest issue is that your tossing arm appears to come down way too fast, but it could be just that particular clip (the last one I believe). Aside from that, serving arm and the feet look fine.