QTV produce all the "streamed" games in the League Cup, to much lower specs than the Premiership games they do, and they use ClubTV comms. What was weird about it, is for some group stage games Buckie vs United, and United vs Stennie they used a neutral commentator in an early round, but not at the Quarter Final stage.
A neutral commentary team is a relatively cheap expense - so very surprised that they went down the ClubTV route on Friday. They did the same with Aberdeen vs Spartans too, but RedTV has Rob McLean on comms, so tends to be a bit more neutral in any case.