Thank you he needs all the help he can get! I know he tries but he doesn't practice enough! I think he is in it for the ladies!While not my personal style (I'm old), I rather like moderate doses of heavy metal guitarists although many play similarly (using the same scales). Jeff Loomis was getting some nice chunky low notes on that video. I noticed he's using a seven-string guitar - that's where the extra low 'chunk is coming from.
If your nephew likes shredding style guitar (and particularly if he plays at all), you might suggest Paul Gilbert. A self-effacing character who has many lesson videos on YouTube. Another player worth a listen is Vinnie Moore who taught Joe Satriani.
vape on, y'all!
And I did listen to Vinnie Moore HUGE Talent!
