gavriel613, we have to get a bit more lomdish here.
if it’s shavuos, maybe the poster is in EY, where there’s no 2nd Day YT.
BUT, if he’s in EY, you have to prove that he’s indeed a Ben Eretz Yisroel, and not a Ben Chutz Laaretz who’s staying in EY, and is obligated in 2 Days, but is still posting.
so, if he’s posting on YT sheni, is there an issur of accepting his post? maybe we hold that electronic devices are d’rabonnon, and posting on YT2 is תרי דרבנן, which we can be meikel with
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