Hi Wilbur,
1. YouTube may require a software update - use the top control to go to Settings & Tools >> Maintenance >> Web Upgrade to get the latest software.
If that doesn't work - close the current web UI page >> go to Settings for the browser >> clear browser data (for Chrome, etc select 'cached images and files') >> open a new browser page >> enter the IP from the BB1 in manually (rather than using a bookmark).
2. The BB1 will not directly interface with the MP3 player. You will need to copy the music on the player to your computer and from there to the BB1. You can do this using 'Upload' over WiFi or using a USB memory stick.
The music to be copied over must be arranged by Artist - Album - Tracks. Please see our 'Organising your music' page -
link - on the website.
Paul
Brennan Support.