First Vid: wow. you're a lot better than me, my 1 finger tapping sucks horribly.

however, towards the end it does get a little bit sloppy, but if you just slow things down loads, then that will fix itself with time.

Second vid: kicks ASS! seriously. Although again, just keep working at it, slow down, speed up again, whatever, you seem to know what youre doing. keep it up!

Third vid: Again, kick ass, buton this one, theres quite a lot of excess noise (although that may be the equipment, i dunno). If you got rid of that, it would sound great!

I've wrote a bit more on my power metal piece here: https://www.ultimate-guitar.com/forum/showthread.php?p=22299807