That video is in Russia. Their safety and handling of cylinders is pretty much non existent. The trucks here in the US that haul bottles have them all secured.
Gas cylinders are quite dangerous, I have seen the aftermath of one going through a cinderblock wall. Had a coworker at previous company I worked for try to hold down a "small" ~30lb CO2 bottle that had fallen and broken the head, he ended up riding it for about 100 feet before he let go. We have quite a few at work with a variety of dangerous gases in them. The more dangerous stuff, like Silane, we use bulk delivery systems to eliminate cylinders and manual handling. We have very specific rules for handling and transporting bottles.
Of course... __it happens, here in Dallas a few years ago:
https://www.youtube.com/watch?v=iam27Mh1zu4