Strength / Weight Training

If you’re using correct form then there’s no reason you should injure yourself in a simple compound lift, unless you go mega heavy or haven’t warmed up properly.

I agree that practicing the correct form, with managable increased loads and correct warmups are key. A belt shouldn't be a device to fix stupidity. Attempting an unfeasable weight ( for any lift, with or without good form) and hoping a belt will help is just asking for trouble.

However the Press isn't exactly a simple compound lift when you're pressing a heavy barbel above your head, trying to stay upright and not cave your skull in.
Outright core strength is unlikely to be the cause for a missed press rep as your arms and shoulders wont get a "too heavy" bar past your chin or nose level. Having the pressure feedback of a belt just allows you to feel how hard your pushing that breath and bracing the torso, so your shoulders have a stable platform to work on... which for me lets me concentrate a bit more on the rest of the movement.

Found the other vid that I was looking for previously.
https://youtu.be/tMAiNQJ6FPc