There's some good videos out there. Some have good production values, some are well researched and some are just interesting by dint of the location or entertainment of how people get into sites or evade detection. Of the bad ones, most are really dull videos that should never have been uploaded but the biggest issue is the clickbait social media influencer style. "Secret underground city. We almost died!". That sort of thing. Just shut up and show me the locations. It's a total waste when they pontificate on what a building was used for when 20s on google would sort it out.
Sadly, some of the junk channels have discovered that their audience really like the made up stuff so keep producing more of it. I have some sympathy, they're DIY drama productions I suppose. I used to quite rate IKS exploration but they've got more and more stupid recently, not quite Exploring With Fighters levels, but that direction.
Of the good ones, Shiey, Ilia Bonderav and BNT for their Chernobyl, train surfing and building climbing. I keep an eye on Beno (lift surfing), Usumalama (some good climbs) and even Ally Law when he's not being a total dick. There's a few quite sensible channels like The Whitewhicks (abandoned railways mainly), Martin Zero and Patrick Dickinson.
I find useful information from videos. The biggest problem is the big channels chasing subscriptions who really don't care if a location is wrecked after they've had their slice of the action. They have encouraged a whole wave of total idiots to drive straight up to locations, attract attention, cause damage and then require extra security to be added. For me Urbex is about doing a recce, studying the maps, working out how to get in and out and doing it without being detected. The idiots just want a location code and expect to drive up with their mates and just walk into a site with no preparation.