So the version here on youtube is a 16:9 widescreen crop of a 4:3 TV crop of the original 16:9 filming? And the remaining CGI are only the 4:3 crop from the lost 16:9 originals? Did I understand corectly?
Then, is there a version somewhere with original uncropped 16:9 live action and 4:3 CGI? I can tolerate side bars. To me, seeing the complete video frame is more important than a consistent frame format.
The original filming was apparently Super 35 [0][1] which is neither 16:9 nor 4:3 but is often cropped to either or both. The show was framed while they were filming it so that they could use the full 16:9 crop (for "cinematic effect"), but the effects were often only composited for the 4:3 crop. (A special few apparently had a chance to be done at the full Super 35 frame, but budget stopped them from doing that with every effects shot.)
So yeah the 16:9 crop we did get in the 90s (on TNT on cable and then on DVD) was cropped further from the 4:3 crop, but it mostly worked because the previous framing for the "full" Super 35 16:9 crop allowed for it.
Reviewing the helpful Wikipedia diagrams, the 4:3 crop actually uses more overall "volume" of the Super 35 frame than the best 16:9 crop, so I think I appreciate the 4:3 version we have a bit better.
I also found this useful visual comparison of the two crops that we have today: https://www.engadget.com/babylon-5-original-4-3-ratio-video-...
[0] https://en.wikipedia.org/wiki/Super_35
[1] https://www.b5tv.com/threads/explain-the-widescreen-issue-to...