Sorry OP, not trying to offend you at all...
Kudos to you for posting vid of your serve and strokes. Good luck w/ your improvement.
LeeD, 5.0? 5.5?? OP is certainly not a 5.0. I agree with 5263's rating. Low to mid 4.5
Yonex VCore 100s - SW 351 6pts HL Tour Bite / Luxilon 4G 16 @ 51lbs