I’d recommend skipping to the 4:30-mark, as everything before that is a promotion for the channel’s mobile game.
To convince the unfortunate Varta power bank to explode, a number of screws are placed on the press, pointy side up. Once the pack is positioned on the screws and the hydraulic press activated, well, you’ll understand why batteries have warnings about not puncturing them.
Yes, they have a tendency to blow up. I’m also not sure if those fumes would be healthy to breath. I’m going to go with “no”.