LD's could also have digital PCM audio tracks in addition to the analog tracks. Some of them later on had Dolby Digital 5.1 as well as some rare discs with DTS.

Look into Hi-Vision as well, which was HD LaserDisc back in the 90s in Japan. Muse was used to broadcast really high def signals for the time.

I have a player that can play both sides without having to get up and flip - CLD-D703