Second one popped up on my feed last night. I'm not sure the second video's examples were more "real" than the first. I think the Japanese reaction of "they can do what they want, I guess that's cool" without any strong feelings is pretty much typical around the world of seeing other people's weird hobbies.
Hmm, how aren't they real? Those are pretty canonical depictions of weeaboos. And the interviewer gave a pretty good explanation of the weeaboo concept to the Japanese: people who only know about Japan from anime, speak shitty Japanese and are obsessed with the culture.
It's really a "goal-post shifting" argument from the "weeaboo haters'. When someone says "Japan wouldn't like weeaboos" they clearly mean "Japan wouldn't like any westerner who's into anime/otaku stuff". It's a way of giving their own dislike more authority. The goal-post shifting comes in the response to videos like this one .
Now the western critics (in the comments) are saying "but the guys in the sample were just Japan-obsessed 'western otaku' not full-on weeaboos!" which is a weirdly specific line to draw, and seems to be a case of shifting goalposts. Americans in bad cosplay doing anime dances badly isn't "weeaboo" enough? Sure, maybe we can find some stuff that's more cringeworthy than that and show it to Japanese people. But that would be just stuff that's inherently cringeworthy, and at that point, it's no longer a good example of "what Japanese people think of weeaboos".
Another argument was that "these interviews were in Tokyo, if you did them out in more regional areas of Japan, you'd get a different response". Well of course you would. But those regions would also have the same differences in the view of Japanese otaku, so it's not a particularly relevant observation about how Japan feels about western otaku/weeaboos in particular.