I get the 300 error on download

The 300 error message can occur when you try to download a live stream.

Live streams become available for download after a few days.

If this is not a live stream but the 300 error persists, the app version may be out of date.

Check the website for the latest version of the application:

YouTube Download https://www.dvdvideosoft.com/products/dvd/Free-YouTube-Download.htm
YouTube to MP3 Converter https://www.dvdvideosoft.com/products/dvd/Free-YouTube-to-MP3-Converter.htm

Update the application to the latest version.