dominKnow | ONE doesn't currently support the importing of embed audio or video in your PowerPoint. Prior to uploading the PowerPoint we recommend you save a copy and remove all embed audio and video.
If you want to utilize the audio and video in your course, optimize the audio and video for the web first on your desktop using any number of free or paid tools to optimize them for the web. They will then be much smaller and you probably won't even notice a difference.
Once optimized you can drag and drop them to the desired page and they will upload to dominKnow | ONE. You can then adjust positioning as needed and add actions to play/trigger other items as appropriate.
TIP: Once your video is added to the page, you can use the audio or video settings tools to change the Player Controls, allowing you to have the video play on load, or to hide the player controls if you wish. To open the context-specific Audio Settings or Video Settings tab and ribbon, click the media element on the page and select the ribbon option.