Good Question. I saw that the other day but since it wasn't uploaded by Inseph himself i didn't think it was his or maybe an unofficial edit. They gave proper credit in the video description but it does seem to hold a bigger roster and the moves the characters have seem to be updated somewhat. Unless those are all his older JUS characters.Edit: Downloaded it as I was curious. It seems to use Inseph's characters, however i do not believe they are his EX Project versions. They are very similar but unless the compiler changed the character/sff names by removing the EX from it, they are not the same. Some characters authors say it was just edited by Inseph, but i believe his EX Project characters are made by him.
Also, the characters that are in this release and the video's release have different moves for the same character. I.E base form Goku has dif moves from the EX Goku in the EX Project. SOME are from the Ex Project but only the ones that were individually released i think.
About Dragon Ball Super Climax. Dragon Ball Super Climax is a classic fighting game made by TrafalgarLawzz - the creator of such games Dragon Ball FighterZ Mugen and Dragon Ball EX Mugen. The game was made with Mugen engine and includes all popular characters from Dragon Ball Super series, as well as the 'new' Broly from Dragon Ball Super movie.