Focusing on the bright side- the video quality was fairly good.
Seriously though, do you just want the vids watched? Do you want a candid opinion of your skill? Do you want advice on how to get better? If the first was your goal, consider it accomplished. If the second was your goal, go talk to Holyquebec. If the third was your goal, keep playing for a while, watch vids of Isai and other good players, and consider going online.
Don't forget he should also read about how to get better,
watching Isai vids won't do him any good if he doesn't know whats happening.
To thread starter
go to smash wiki and just search up
Z-Cancel
DI
Short Hop
Tech
Dashdance
*you probably know some of these, just outlining the basic stuff u need for tech skill
Also you gotta be quicker, since ur Link immediately your at a disadvantage to most characters, so you don't want to go toe-to-toe in close range combat. Link's normally just throw bombs and boomerangs to wait for openings. That's not all, but u know
basically just create some distance, and don't repeat the same things, be unpredictable, if your opponent knows u always spin attack when they're pressuring u then yeah they'll just shield and ur gonna get punished