So, by that logic, bands like Foo Fighters, Red Hot Chili Peppers, U2, Pearl Jam and a slew of other bands in that age range have no business making music videos because it is "awkward" for younger people such as yourself to watch? Last I checked, most Foo, Peppers, U2 and Pearl Jam fans are probably in your age bracket (which, given your comments, I am assuming you're somewhere south of 40). Hell, many Rolling Stones fans are that age and have no issues with them making videos despite the fact that they're in their 60s now.
It has nothing to do with trying to relive younger days for most bands and everything to do with still having a passion for music and wanting to pursue that passion. I am an aspiring bassist and hope to start/join a band soon. If I'm in my 40s and still have a passion for music, you can be damn sure I'm going to make a music video and do whatever else is necessary to promote my band's music. That's what a good musician does, regardless of age.