IRL it's probably a few seconds (minimum, at least). Online it's gotta be like 6 to a dozen posts I guess, idk. I guess it's mostly communication IRL and in videos? If you include body language, intonation, etc. in communication? It's also possibly appearance, clothes, voice, aura, etc. And online in text it's almost entirely communication. When I say "communication" I don't necessarily mean between me and them--usually it's a one-way thing, I just see their public content..