Well, the animations are a compromise. For technical reasons I only use single frame overlays (6 frames + reverse, looped).
There are enough games with cinema like animations imho. I also do not want to have this game beyond 2 GBytes and will definitely not use MP4 or MPEG movies for the animations because I hate how poorly interactive they are.
Just take them as illustrations of the scenes and employ your imagination ;)
BTW: There is an open all button: Press shift and then Open changes to "Open All" :)