after recently purchasing a rather expensive (for me) ebike and agonizing about what sort of lock to get for it, here is what i have learned: given enough time, any bike lock can be sawed through, and people who live in places where bicycles must be stored outdoors overnight or for long periods during the day are kind of shit out of luck and will either need to store bikes indoors or gamble on having a bike that’s less desirable or locked more securely than the one next to it. i ended up buying the highest “rated” bike lock i could find for my needs, which other than the color, looks a lot like the one in the video above. even that had several negative reviews accompanied by images of the lock having been sawed through and poof no bike. but these were generally bikes stored outdoors overnight. and as others have noted, the average bike thief does not have the skill that lockpicking lawyer has.
in a nutshell, deterring bike theft comes down to not making it easy, and to some extent is like that joke about escaping bear attacks by hiking w/ someone slower.