I find utube is a great toy for amusement.I Know if I need a blow up of a gun and it's from a reliable source, IE: a manufacturer, I would use it to diagose a problem or see if a specific part was malfuntioning, "say to compare it to what I had".
The silly videos and hundreds of guys giving reviews on different models of weapons, has become so over the top, that it's also rediculous. Some of these kids make videos, and have no clue as to how to field strip the weapon ,or shoot it, it's funny for about 1 minute. I actually think that someone should review some of the dangeous stuff that people are showing "or think they are" how to convert weapons to full auto, and or make supressors, along with lists of parts and instructions on how to do this. I can't believe anyone would be rekless or stupid enough to tape themselves modifying an AK with no license, to make it run full auto, to do so, on a public site. I don't wish to impose limitations of freedom of speech, but instructing bomb making, and other dangerous and illegal activities should be at least overlooked by someone other than the people viewing it. Otherwise it is a pretty good medium for sharing videos with friends or strangers.
Kids are very curious by nature, and if you show them how to do something that they think is "cool", they may try it, just to see if it works. When it's as easy as using a "garbage bag tie", it could be a recipie for disaster.