I would love to see one of these livestreams where they mention some current events. Movies take months to get a few minutes of footage like this, so maybe that would put an end to the CGI assumption.
And, as mentioned, Apollo 13 had just a few minutes of no-gravity footage during it's 2 hour runtime. I only caught the final 10 minutes of this broadcast, but I saw 10 minutes straight, uncut, of no-gravity footage. There's no way that this could have been faked with practical effects, so it's either real or CGI. But I have no idea where all this time and money for CGI comes from.