Hi, My name is Aviram, Itf level 2 coach .
I think your not far from college level, from what I can tell in the video.
Your forehand and Bh could improve if your follow through will be complete, that will give you more power.
now from what I'v seen your follow through are a bit short .
Your serve Is great, don't need to change anything about it .
I even think its quite beautiful .
Your slice is like the others said above me, too hard, you need to be more relaxed on the slice, let the racquet do the job a bit more .
The video is terrible, you need to get a good camera and video from a high and clear angle .
good luck .