Depends. It could be good, or it could be bad, depending on how you do it.
The examples above are more about popularization of rationality than of effective altruism, but I believe the lesson applies generally. Basically, if the videos are good, they can improve the perception of the cause, but if they are bad, they will make everyone associated with the cause look like a group of morons (or worse, scammers).
So, I would need to see the specific videos first because I express my opinion. Sadly, enthusiasm is not a guarantee of quality.
In the meanwhile, these are nice videos related to effective altruism:
As a recent entrant to the sphere of rationality and effective altruism, I often wonder if the primarily-nerdy audience & community (which I adore) is less than a boon to the objectives of effective altruism.
If a popularization (through social media platforms such as TikTok) were to happen with EA, would this even be a good thing?