Publish Online and PDF are two totally different formats. What works in one may or may not work in others.
Page transitions is an example of PDF only and we would need to know what button actions you're referring to.
Videos should work but they need to be in the MP4 format so they work with the HTML and CSS used by Publish Online.
Interactive PDF videos still support Flash formats like F4V. Use Adobe Media Player to convert them to MP4.
Additionally, you can check the interactivity behavior on the Window>Interactivity>Epub Interactivity Preview panel. Incase you still face the problem, please send the document package to email@example.com with subject ForSagar.