For the mature person.

Derick ,  That guy's hilarious!  Cut the top off a 12-string?  Ha ha ha!! 

I might have gone with the less severe, just get a wider necked guitar and lighter gauge strings first.  LOL.

The shelf thing was funny too.  When you get older, you get  much  more prone to "pulling" muscles when you stretch in awkward ways, or even not-so-awkward ways.  Putting that shelf against your chair and then  reaching  for a keyboard and lifting it to put it on that un-stabilized shelf thing?......ya, what could  possibly  go wrong there.  LOL. 

Oh man, funniest vid I've seen in awhile.  What really made me laugh though, but more at myself, is I can't figure out if he's serious or just mildly having fun trolling for laughs.

Mind you, unfortunately I can relate to some of the things, sitting in the armchair, using smaller guitars, quite a few years ago I only bought and played the Dreadnought size guitar, now I can't even lift one up, if it were only possible to build a 00 size guitar that sounded like a Dreadnought guitars, I'd buy one.