Sorry that this happened to you, OP.

I don't think people understand that the DR tomes are a reward for helping others. Earning those tomes means waiting for cutscenes if that's what someone wants to do. It also means exploring the whole area, and giving someone a good experience if they're new.

FFXIV should fix this problem by simply not letting anyone move until everyone is out of the cutscene, or by making everyone wait in a locked area, like the entry circles that are used at the beginning of a dungeon.

When I run dungeons, I stand outside with the new people if people are going too fast.