What he's talking about is that the CGI in B5 was filmed in 4:3 and not in 16:9 like the rest of the show. When they did the "high res" releases they had to make the choice of doing everything in 16:9 or in 4:3.
In 4:3 it looks good and like the original airing show, in 16:9 any non-digital/composite shot looks freaking fantastic. But once you get to any digital or composite shot it takes a nose dive in quality.
A very well written show. It's crazy to think a lot of people don't even get to watch this, because it's so hard to find. I couldn't find it anywhere (except for DVD's) so I had to resort to torrents.
There's a 4K 4:3 remaster streaming on HBO Max. It wasn't exactly well advertised (certainly not to the extent that it has been hard to miss this Mad Men advertising), but it exists and is a good way to watch the show. Feels a bit less cinematic not being in 16:9, but it looks good other than that because the show was shot to be 4:3 safe (as that was still the most common TV at the time).
I loved B5's story, but no remaster is going to fix the cheeseball acting of the show. It felt 200 years old even when it was airing. (Sigh, I'm probably still going to rewatch it...)
In 4:3 it looks good and like the original airing show, in 16:9 any non-digital/composite shot looks freaking fantastic. But once you get to any digital or composite shot it takes a nose dive in quality.