Why just videos? Images and text posts could be used in the same way, to disguise messaging/propaganda as a joke etc. FWIW I don't think Facebook is likely any

Why just videos? Images and text posts could be used in the same way, to disguise messaging/propaganda as a joke etc. FWIW I don't think Facebook is likely any better in this area than TikTok, or indeed any social network or platform based around user generated content. It's likely always possible to create popular content that subconsciously influences people's thinking. One thing that might separate Facebook from TikTok (for some people, not necessarily myself) is the question of "do I trust who is serving this content?" - in these days of algorithmically generated feeds, these companies can likely get away with more in terms of inserting specifically targeted content etc. without it looking suspicious, and have people assume it's showing because it's organically popular.