"RaRCS" stands for "Record and Record Combined Stereo", which means that the left and the right parts of the video comes from two different studio records.
Regarding the current video, you can enjoy "Vamos a la Playa" from Righeira brothers: on the right side the official video clip by Egg2.0 from 2010 (playback performance), while on the left side a playback TV show performance from 1983 (Thommys Popshow). Links:
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![Masterboy - I Got To Give It Up [1994]](https://i.ytimg.com/vi/TPPGTKUI3t8/mqdefault.jpg)
![Stela Cole - Rhapsody In Pink (Official Video) [Ultra Records]](https://i.ytimg.com/vi/e7f5-AjjbdQ/mqdefault.jpg)
