You had some nice ideas and look like you've got good potential . My advice is this; make sure all of your angles make the stunt as clear as possible before trying to make it cinematic, the stunts are always the most important factor in a stunt video, great examples of this you can check out are Beat's 'Harmony', Daffy's 'Plague', and Artifex's 'Oasis'. Secondly remember that sometimes less is more, try starting out with a clean edit and then build upon that with effects and offbeat timing, but only go as far as you feel is necessary. You don't need to go crazy to impress, it's more about being perfectly in tune with the sync and creating a good atmosphere.