Having Problems With Right Hand. Maybe Watching These Videos

I do not understand what is going on this year my right hand started feeling like it was constantly tired after practicing and my sound was coming out as if it were forced. I was under ALOT of nervous tension and I am working on it but I still feel it and it bothers me. I am going to a good physical therapist(shmule tatz) and he is working on my wrist (he says that the bones in my wrist are not mobile and my muscles are compensating by over working). Maybe these videos might clue someone on what might be going on wrong. My wrist begins to feel tight in fast scale like passage work and lound contrapuntal passages in one hand (when the pinky and fourth fingers play the melody and fingers beneath play contrapuntal passages). I mean I can still play but its just I have the feeling and it bugs me. This is from the year before I started feeling trouble. This is from this year (I dont know if its noticeable. I feel it much less on stage)

To tell you guys the truth I don't know whether it is partly neurological but I am afraid. I have to begin heavy stuff like Brahms and other heavy works and I am simply nervous to sit and practice for fear of hurting myself. I just feel this tiredness in my right hand even when I clap too much. I'm kind of panicking