Just to play devil's advocate...
In Aldi the other day I'm getting some milk, bread, cheese, not much. My eldest (4) is nearby waiting. My baby (who I swear is Houdini) is wiggling out of his straps. He does this weird straining thing and then kinda hooks his leg up. He's getting all kinds of tangled and I'm trying to get him back in. The woman at the till gets to my shopping and I say "just give me a sec, need to strap him in" (he's hanging out). She starts putting my stuff through, throws it so hard the bread slides on the floor. She says "I'm not waiting". So my baby escapes and I'm grabbing the groceries.
The person in front starts tutting and muttering to her friend about how useless I am. The guy behind is doing the same.
A few weeks ago my "strapped in tight" one year old got out so fast he launched himself onto the floor and had a huge lump. I got judged then.... I cried. I have tried literally everything.
Haven't watched the video so the guy could just be a moron mind!