Can you submit music files or youtube videos?

Music files can be uploaded to your form. Inside of this guide you can find how to create Upload form:

https://www.jotform.com/help/332-How-to-Create-File-Upload-Forms 

And inside of this guides you can find how to change the allowed file types/extensions in the upload field and how to change upload file size limit:

https://www.jotform.com/help/29-How-to-Change-the-Allowed-File-Types-Extensions-in-the-Upload-Field 

https://www.jotform.com/help/33-Changing-the-File-Upload-Size-Limit 

YouTube videos can not be upload to the form, but your users can provide URL of YouTube video. 

Hope this will help. Let us know if you need further assistance.