If we would be able to group layers which have their own hierarchy with in the group but act as a whole to the rest of the layers, that would be awesome!
Mark Ridder commented
Very convenient! Thanks.
AdminPhilippe Chaurand (Admin, Millumin) commented
For the moment, you can create composition to "group" layers.
A new cuepoint system is coming, that will make these compositions more flexible. Especially if you just want to group/launch several movies at the same time and make them loop forever.