"RaRCS" stands for "Record and Record Combined Stereo", which means that the left and the right sides of the video comes from two studio records.
Regarding the current video, you can enjoy "Celebrate The World" from "Womack and Womack": on the right side the official music video clip, while on the left side a TV presentation from 1990 (tve1, Consience, Las Vacaciones de Vicky). The TV presentation is NOT live (mimed, playback), but at least different, especially after 2m49s . Links:
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![](https://i.ytimg.com/vi/Vu5uqvwmmzc/maxresdefault.jpg)