The video quality can be much better.
What is your camera?
1) Place the camera closer so that your image is much larger.
2) Video yourself in bright sunlight so that the automatic exposure control will select a faster shutter and the motion blur will be minimal.
3) I believe that your camera does not have good edges in the center of the frame for the camera's automatic focus to focus on. ? Maybe the sharp angle up from the ground does not allow the camera to focus well on where you will be - what is the distance to focus on?
4) Get a cheap tripod. If smartphone, get a smartphone-to-tripod camera adapter, both about $20 total. Be careful that your camera does not get hit. A rope from the tripod to fence may help if the tripod gets hit.
5) Take a test video before the strokes to see the video quality. Adjust to improve the video.
6) Take a close up video or picture of your forehand grip & from more than one angle.
Federer has a straight arm forehand and uses an Eastern Forehand Grip. Most ATP forehands use a bend at the elbow as yours does and probably a Semi-Western Grip.
Macci has some longer instructional videos with forehand details. Macci uses Federer as a model in this video. Search for other Macci videos. Search bent elbow forehands. There is variety in forehand techniques.
Compare your techniques to similar high level forehands using high speed video and
similar camera angles. Your grip, arm, wrist and racket, etc. angles & locations probably have a flaw.
Don't practice with any pain and especially if you get wrist pain. The wrist is frequently injured and can be very difficult to heal.