I'm not expecting anything on TikTok or Instagram to convert a single voter still claiming to be Republican from voting for Trump.

at the other end of the spectrum, we have The Atlantic devoting an entire issue to the dangers of re-electing trump.
this is partly, if not entirely, due to the passive\apathethic tone of most centrist media in 2016,2020 (even if its now reaching fewer people).

likewise, i am not convinced there are enough Independents or Republicans to read The Atlantic, much less have heard of it, to result in a significant actualized biden votes.
so the point is, every media outlet big or small, biased garbage or not, has to be pulled into play.

(frankly, i now find the anti-trump crowd who were unable to grok who he is before 2016 a complete mystery, including the many who worked for him and were quit\fired. and there seems to be quite a few public figures who flopped again and now are looking to be his 'employee\partner' in 2024.
bit by bit, we have to assume the sheer volume of media does get the marginal trump voter to show up. in red+purple states, there are dozens of local ads every hour on local TV where every GOP candidate mentions trump multiple times...effectively turning every broadcaster into Fox News.)