It doesn't look accidental, at all. The dude intentionally goes back and pushes the TV and it's obvious.
When you accidentally knock something over what is your instinct reaction? Try to hold it, put your hand, how many of you have sent your phone flying over after clumsily dropping it and trying to "catch" it with your foot? Like it was a ball and you an expert futbol player lol.
Even on work related injuries, people with heavy machinery tend to get injured because when something fails their instinct kicks in and they get their hands or feet get caught in it.
It looks like he lost balance and tried to use the tv to get it... lol. Then instead of trying to avoid it actually falling, he jumps back and pushes the other one with his hand. This does not clear the store for not securing the tvs though, that's basic, but the dude actually pushed the tvs 'accidentally'.