I finally found that episode that BTS RM Clip 'Solo career or BTS' came from with ENG sub.

[StarlightSilverCrown2]

I believe I must have talked about this on reddit as I can't seem to find my post here where I mentioned this, but I came across that familiar clip on my IG homefeed where BTS RM was asked if he wants a solo career or to stay with BTS as a hidden camera prank, and after some looking at other fans playlists that got suggested to me, I came across the full episode that it originally came from!.

Here is the episode below.

TimeStamp for the moment. 31:29