I don't claim to be an expert, but I have heard enough advice from those who are to piece together what they may say about your solve. Without further ado:
I noticed that you have a lot of cube turns: I would try to eliminate them as much as possible. Much of the time, one could have done without a cube turn: at 0:06, you notice you do F2, then zU2L'R. You could have done F2L2D'U for the same effect. You seem have the same problem I and a number of other cubers I know have: you rush during your solve. Many times your motion seems jerky. I would try to relax. You do your U-perm very erratically; you had to do RR instead of R2, and your fingertricks don't flow smoothly from one to the next. I personally have done that U-perm (same direction) in 1.25 before. Look ahead is nice, and it comes most easily with going slow and relaxing.
I'm sorry if this comes out harsh; it was not my intention. Good luck getting sub-25!