Do you have another tool you've used? Feel free to share in the comments!
- Use SnagIt (extension for Chrome) with your Google Slides presentation. Instructions here.
- Use Movenote (another Chrome extension.)Instructions here.
- Add sounds in Powerpoint. Instructions are here. This is tricky because you have to have the folder with the sound files for them to play during the presentation... so if you just send me the .ppt file and not the folder with the sound files, they won't play.
- Use this video dropbox right from this page: