Yikes. I already knew this, but videos like this with a few thousand views really remind me that YouTube numbers are not based on value of content so much as popularity.
#1: Hood latch. It doesn't pop because it's not properly adjusted. You can adjust the bumpers and the latch. He also seems to have it shimmed in the back - which is stupid if that's the case. The bumpers are cheap from Toyota.
#2: Sunroof. It's aftermarket. Putting silicone in random spots isn't going to fix anything. It needs new seals.
#3: Hatch Leaks. That's a legit complaint. Most my mk3's I owned have leaked. Possible leak points are the lower trim piece, spoiler mounts, wiper hole, antenna.
#4: Rust. 28 year old beat up car. No surprise there.
#5: Speakers. Yeah, 28 year old small speakers won't exactly bump.
#6: Smoke at startup. Valve stem seals or oil in intercooler from blow by or turbo seals would be my guess.
#7: Steering angle. Not meant for drifting.
#8: Headlight sprayers. Really? haha. He's concerned about looks with a thin steel bar front bumper.
#9: Mismatched key set. Well, get them re-keyed so you have one key for everything...
#10: Wiring. Sounds like a bit of a hack job. Can't blame him for not wanting to redo that. I did on mine and it was a huge task.
Doesn't sound half bad though when he revs the shit out of it during #5!