As advised by others your very likely to get problems, they are both territorial fish the rtbs also being more aggressive than the albino ruby shark (rainbow). In your clip at about 1 min 45 sec theres alot of fast movement and snapping from a rtbs and albino shark, that isnt actually playful thats fighting for dominance. Over time you will find them fighting more and more and 1 shark will out grow all the others then ranking down to the weakest.
I used to have 3 ruby sharks in my tank (advised by my lfs that a group of them was better, I dont shop there anymore) I had 1 that grew to full lenth another slightly smaller and a tiny 1, I never knew the other 2 were stressed by the more dominant 1 who chased and interupted them eating all the time until my new lfs that I shop at told me so I rehomed 2 with him.
Admittedly I also have 1 rtbs which wasnt bought until the ruby shark was full size so wouldnt be dominated by the more aggressive rtbs but they have the space and plenty hiding places as I have a 450l tank. Dont get me wrong, there not secret lovers but they keep themselves to themselves but this is only a 1 off for me as when the ruby eventually dies (hopefully many years to go yet) I wouldnt think of replacing her with another as the rtbs would simply bully it to death.
I would personally just keep 1 of either the rtbs or ruby shark otherwise that fighting will only get worse. Hope this helps.