I loaded your stretchy man video into Davinci and it was smooth sailing, afterwards I tried rendering the animation as mov with png and some reason my ball bouncing animation also loads in now... not sure what changed! How do you make your file sizes so small by the way? Mine usually comes out at 100 mb and I noticed yours are tiny in comparison.
Thanks a bunch for your help Nate, I'm grateful for the time you've taken to help me out.