Mixing SWF in PDF output is generally not a good idea, except for an isolated animated object. Even when it works it doesn't usually display in a very professional way. Many computers (and no mobile devices) will not display SWF.
For the video and sound to work, you should stick to the actions that work with buttons in PDF.
If you look at the actions list for a button, choose from the top group of items, or from the bottom group (PDF Only). Don't use the ones labelled Liquid HTML5 and SWF.
If you do that, and if you choose a good video and audio formats (preferably MP4 and MP3), then it should work fine.