After watching the video, the two main factors influencing grade boundaries in 2022 are generous marking and advanced information. WJEC, the examination board for Wales, did not give out advanced information to the very high majority of AS and A2 level subjects, as well as the GCSE subject examinations.
"Grade boundaries are likely to be lower than in previous years", England's exams regulator Ofqual stated, meaning that grade boundaries are likely to be lower, which further backs up the statement. I think you also have to realise that several examination boards have made mistakes including throughout their exams and throughout their advanced information, as well as the applied impacts of covid meaning that there are a much higher proportion of students who are sitting exams for the first time this year, as well as potentially sitting subjects that they wouldn't be able to study if they had normal examinations the year before (in terms of grade requirements). All of these have to be taken into account by the examination boards, so yes the things people including myself are saying are partly true, and aren't just "posting wrong information".
Next year, obviously covid depending, hopefully examinations and grade boundaries will be set equally back to precovid years.