YouTube finally working - use these steps on Mac
After all the help I've received here, I thought I'd pass along what got me going for the sake of those who are just beginning the search themselves.
First, follow the steps found here -
Then, download v1.2.1a of Independence here -
Using this new version, first deactivate your iPhone, then reactivate it.
Reboot the iPhone, and YouTube should be working. It did the trick for me! Good luck!