@Katrina – no chance here. Animations in InDesign are directly tied with the Flash ecosystem.
Look, if "in5" is something for you:
Don't know, if they are ready for InDesign CC…
Im not that known to the interactive qualitys of InDesign still but did you also have the animations online in the same folder at the time? That might be the cause...
How exactly are you getting those animations into the PDF?
What web browser are you viewing it on?
Some web browsers have introduced their own PDF readers which are complete pittacne. I wish they would stop using them.