If you wanted to avoid people being "flatpilled" by flat-earthers, you have to recognize they still are going to be drawn to flatness, and you should recommend actual science, because space-time is actually flat.
As far as producing good quality socialist content goes, well high production value takes money for stuff like a powerful computers for rendering fancy videos, a decent camera microphone etc. And that locks you into a the system in terms of having to recoup the costs in terms of social media platform ad-money for viable economics. And if you manage to get traction and viewership the algorithms are going to be tuned to divert people away from you. In corporate social media you are supposed to be an influencer for their interests afterall.
You would probably have to aim at creating a streamlined shared asset production line, where you can minimize your cost time and effort per video because you can recombine already created stuff, for new videos. Since you will get max view locked to a few thausend views and grey-listed in search engines where people can only find you if you by directly searching for you, but cannot be stumbled upon by people who did not search specifically for you. You have to rely on a mass of people doing this and drag other people into as well.
And you have to have a titanic grasp on linguistics and to some extend philosophy to be able to outmanoeuvre the neo-liberal co-optation mechanism, where everything gets an anti-class wash, before being reproduced in a form where it is compatible with neo-liberal economic doctrine.
Lastly you will have to realize that presence on corporate social media platforms can only be a point of entry for people and draw people away to a platform that isn't ideologically biased against you, which will put you ad odds with attention maximization algorithms, which are sensitive to patterns where content induces people to leave the platform.
You also have to be cognisant of the systemic pressure on people that nudges them to conform to wishes of concentrated sources of money. You cannot just rely on people being ideologically pure and motivationally principled enough to be able to withstand the nudging, that takes a stress resistance that not enough people possess. You have to structurally understand how to parasitise the system, where it keeps doing your bidding even-though your are not serving it's interests. (growing at the expense of your opponent)
I'm not saying this can't be done I'm saying it has to be very well thought out before you drive people to invest a lot of time and effort into it. You want to avoid the pattern of activism-mills that basically are in an infinite loop of milking the enthusiasm of newcomers, that after a while realise that it's a treadmill that goes nowhere, before being replaced by the next batch of enthusiastic newcomers. (the permanent beginning) You want to be able to build up over time, and for that you do have to be able to circumnavigate all the dependency traps, that would siphon off your resources for build up.