I don’t know if this has ever been formally discussed. I think there might have been a thread about this on the old forums, but my memory is hazy.
We have guidelines saying to split recordings if there are different audio channels, but what about video recordings? Older, analog video release formats (VHS, Betamax, Laserdisc, etc.) used either NTSC, NTSC-J, PAL or SECAM encoding. Should there be separate recordings for different format versions of a video release? Similarly, should there be separate releases for different format versions of a release? (This is almost a no-brainer, but then I found this in Discogs.)