Too many bad theories at once.
The first video is odd, I've seen it when it first came up. Most likely explanation - dumb joke. Either situational (messing about), or 'for the cameras'. Second most likely explanation - get the conspiracy mill going at a point where US response was lacking to say at least. ('Anything to divert people to talk about that'). I didnt quite believe in the second one - after pondering it for a bit, and then left it at that..
Agenda 21 is a long used umbrella theme in right wing conspiracy circles. Somone got their hands on a strategy paper (you define outlooks to then be able to implement actions towards reaching them - in the end stuff often ends up pretty different, but you need those goalpost papers). I'm not certain about the origin of that paper off the top of my head, so I might be wrong - but I don't want to look it up right now.
No one would be hoping for global collapse, except the people at the very bottom of the ladder, and if you talk about an economic reset most people, especially elites, wouldnt like that either.
That said, the Covid-19 crisis changed peoples perspectives, has accelerated a few processes (f.e. the british car industry is on the verge of not existing anymore - and government isn't subsidizing anymore it seems. Also with recovery (and state investment plans) come new opportunities. So it did something.
Weather the virus was manmade (all scientists speaking out on that point said 'no - very unlikely') or a chance event that no one had planned for and wasnt on the radar (look at all the things and sectors that had to be reimplemented, once it was known that we had a pandemic on our hands, because countries cut down public spending a little too much) -- even with a conspiracy mindset in place - you and I will never know.
Out of that follows, that it is pretty useless for you and I and others to worry about it - because even knowing a rather 'strange' version the 'truth' doesnt do anything beneficial. And the connections are weak, so its not even an entirely convincing strange story. Its a cool strange story though..
With no conspiracy mindset in place thats needed, I'd just pick up the conventional opinion, and agree with everyone else that -- no, it occurred naturally, and there is no hard evidence, to dispute it. And the video above, is lousy soft evidence for that as well..
(Almost entirely unrelated, just banks on the 'fact' that 'the government is out for us..
')
The easy way to go about this is for you to actually sketch out what your are fearing, and me or other people telling you, why you dont have to fear it - because the world works a little differently.
In that aspect, and in the other one, and...
First two examples I'd start with is, that there isn't really a good vs. evil villain vs. the good guys thing going on. So someone actually trying to 'kill most people' or 'destroy the economy' wouldnt actually exist - thats far too simplified.
Usually you'd have varied interests, and they would sometimes compete against each other - each of them creating good and bad outcomes alike.
Second thought I'd leave you with is that no one would double down on killing more of the worlds population with another virus. First how strange of a thought.
Second, wars would be far more lucrative.
So however you think the world works, kind of is not how world affairs usually go. You see that on the less important stuff.
There is far too much stuff going astray, or going in weird directions all the time, for 'all of it' to be following 'a plan'.
On the other side of it, you sometimes have strange outcomes, where the Covid-19 crisis, seemingly was the emotional break millennials needed (surveys looked freaking depressing, when you asked them), and that it will make many of them change outlooks. Which also would be great in terms of climate action, and also what bigger corporations needed (stabilization of society).
Here, my conspiracy theory is better - and I dont even go with 'now I know the truth, dont you see?'.
And I also dont believe that Covid-19 was man made, and don't get looked at weird if I dont have to..
That said - I'll tell everyone that wants to hear it in a heartbeat, that the Fridays for Future movement was astroturfed, designed, financed with capital from a certain wing of investors, that their marketing was created by top agencies in the field, that literally every corporate and power structure tried to get their own version of it, once it drew traction, because it was so compatible with their needs (everyone knew, that this was a longterm goal), that it was just the way to try to gain inroads, by trying to modify public behavior, which would have been a gain for every industry and every institution, and every insurer at virtually no cost, and that elites exactly ran it as you'd think about it in your worst nightmares, namely by telling their children to mingle a little with the greenies, to reduce societal tensions.
Thats my conspiracy theory, and I'm sticking to that one.
edit: Oh I have a third general point I'd like to make. Science usually isnt that political that it can be 'in on something'. Its built so every field is intensely competitive, and people always critique each others opinions. And try to disprove their work. And thats how its supposed to be. It always strikes me, that it would be _very_ hard to get all those under wraps under the guise of a political 'game'. Thats usually not possible.
