Thunderstruck is arguably AC/DC's best song, and like all their songs it's pretty easy to play. I don't know why it doesn't get covered more.
The banjo player is decent, but honestly, it's easier to play fast like that on the banjo than it is on guitar.
Also this does indeed belong in the music forum.
If you like this BTW you should check out Weird Al's old polka medleys. That's what this reminds me of.