The game in my video was backpocket 9 ball. It's played like regular 9 ball until you are on the 9. Then it's played like one pocket, where each player must make the 9 in their own hole (but the holes are at the head end of the table). There is no calling any shot in this game.
For "Bank Pool" specifically, I've played in 5 or 6 DCC's, and to my recollection the player's meetings (that I did attend) say hitting any tit on the side pocket on the way to the corner is a good shot.
Roger, in back pocket 9B, that's a good shot IMO; however, as stated in the rules listed above, in banks, that is not a good shot.