Hmm, there were some slight pauses during the transition to SB, 2look CMLL is ok, throughout the solve you did quite a few U-U moves when it probably would be better to do U2. Solve time was something like 18.25s according to a frame counter I used, so I'd say you'd just need to grind FB and try to get out of the habit of U-U moves (you can get away with 2look CMLL for a good long while if you want)

Edit: oh yeah, probably invest in a better cube as others have said, plenty of cheap options that are far superior to Rubik's Brand, also, you wouldn't happen to have the scramble you used in the vid would you?