No, stick to MBG. It's best to just use the vanilla game instead of mods.
First of all, .rrecs/.avi are easier to cheat than .recs. This is important to catch cheating (including unintentional cheating) since the game is trivially easy to cheat.
Secondly, don't change the rules of the game after it has started. It was unfortunate that MBP got small changes but that's what happened, so the most fair thing is for everyone to use the real game.
One could argue about certain levels and people in terms of where direct video is more appropriate to use. But on the whole .rec is the way to go.
Regarding Rosie's Battlements, it's certainly a strange case since apparently she got an angle that no one else has managed to get ever and the .rec gives "regular" angles you would expect from that gate trap.
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