I don’t think that’s realistic. They will undoubtedly get exposed to socdem and liberal content, youtube or otherwise. What to do instead is prep people and expose them to the various ways liberal ideology can be covertly distributed, which is done consciously and unconsciously by media outlets/figures.

In addition to more overtly ML video content, there should be a more deliberate propaganda line about joining ML organizations/parties and organizations/parties of other militant Marxist forms. The major thing I see missing in a lot of Marxist mass media (youtube in particular) is the emphasis of organization, which is unfortunate.