The documentation on embedding videos into a PDF requires a flash format. Adobe will cancel support for Flash including removing all downloads of the player in December 2020.
How do we continue to embed videos without flash? Can you publish an example and update the documentation?
We have logged an investigation ticket as PDFNET-48466 in our issue tracking system for the requirements of yours. We will investigate the feasibility of this feature and keep you posted with the status of its availability. Please spare us some time.