Perhaps Dreamweaver has to recreate the fields to match the mp3 format as the upload to Youtube is in a different format and streaming rate.
I think simply downloading it in a different format could affect the programming in the audio.
From the FAQ:
Why do the videos not work when downloaded?
The video was uploaded with a certain extension/file type and gets compressed when converted into a different file format and that tends to mess with the frequency and programming in the audio. There are some people who have downloaded it and didn’t feel the same effects when downloaded. You can download them and try them out if you like, no one is stopping you. And if it works for you, awesome.
I put this out there because I would like everyone to get the full benefit from the audios. Results vary with the downloaded audios and I don’t know if you want to spend your time listening to something that isn’t guaranteed compared to the videos on youtube which have a high success rate(testimonials). In due time, updated mp3 versions of the youtube versions will be available for download.
*You can also download these audios these audios through youtube red and they would work perfectly fine.