Posting immediately after an interview is broadcast about the content of that interview is perfectly reasonable. That sort of research is not necessary to react to what we heard.
I saw the same interview: it was with
either the official host coverage or a major international broadcaster (
I didn't clock who was holding the mike)* and in the official mixed zone, and it was very much in the tone described. If he dealt with the matter differently in a later interview, then maybe he realised (or was made to realise) what a poor impression he had given of himself.
Edit: * EuroSport and l'Equipe sleeved microphones,
5:14 27 into the English language Disco+ broadcast (although timings might be different in other variants)
Edit to editnote:
here on You Tube