I think this is the key issue here is that The Raspberry Pi Guy's honest mistake was horribly magnified by a tiny minority of boards out there. That's the problem here: there are a load of very similar boards of highly varying quality, configuration and default jumpering.
There are a lot of models of L298N board but the little red ones like the one in TRPG video and mine all have the 5V next to the enable pins. This is to let the L298N boards easily be used with stepper motors.
So some boards don't have jumpers but I bet if you check the continuity between the 5V screw terminals and the two pins behind the enable pins you'll find them connected on all boards which look like these.
The boards need 5V (or close to it) to power the logic portion of the L298N chip. Many boards have onboard 5V regulators so you just need to provide Vin and not a 5V source.
If one doesn't use the onboard regulator then you need to connect an outside 5V source to either the screw terminal position or the one of the two 5V pins behind the enable pins. In all cases there will be 5V on the two pins behind the enable pins.
It's not too hard to figure out how the boards are laid out if one probes around with a multimeter.
I'm sure the initial mistake was honest though IMO, incredibly ignorant. Understanding what the jumpers on a PCB should be a prerequisite before using the board let alone pretending to instruct others on its use.
While the initial mistake was honest, the refusal to listen to the many warnings and objections brought up by others is incredibly negligent. IMO, Matt was enjoying being The Raspberry Pi Guy too much and let his hubris blind him to his short comings.
The many sad tales this video has caused can be read by searching for the video URL in this forum