0:02 - Spacing issues. I was actually surprised you did your fair without any DI to the right. Shffl nairs or pillar. Shffling is easier.
0:05 - Jump cancel or wave cancel your shines. A jump cancel into a dair to the left would've worked nicely.
0:06 - Looks like you tried to go for a pillar there. Short hopping out of your shines.
You had quite a few combo opportunities as well. Like 0:26, you could have an L-canceled dair to a shine and continue from there, but you attempted a bair to a shine.
Also saw a try or two on the RSHL. Keep practicing that.
0:55 - You used your up-tilt and it connected, but you just stood there. Could have used an aerial.
2:10 - Unless you're trying to rack up some damage, stick with the dair when you're up that high and off the edge. Potential spike opportunity, but you went for the fair, accidental or not. Also, DI so you don't suicide like that.
Teching. It's hard, but try to tech those moments where you're especially near the ground but stil falling (lame way to describe that, so just look at 2:53-2:54). Tech when you've been thrown as well. If you don't, you'll be setup for some punishment.
Other than that, (generic stuff ahead) work on sweetspotting, more pressure with your SHL, shffling, and comboing. Oh, and mindgames, son. Saw quite a few of those as well, unless the lot of them are by accident.