TubeNet

Saw this on Amazon and tossed the $18.99 at them even though I already had a PC based endoscope.

For the money it's hard to beat and using the phone is much more convenient for me than dragging the tuba to the computer.

It came with a 90 degree end, PC style USB adapter, a cable long enough to be tuba useful and software.
http://a.co/bx9As5x

It would be interesting to hear about how well it works out. The question that I have had when looking at the pictures: how tight can they turn? The camera end always looks like it's over an inch long and inflexible, which to me sounds like trouble in a tight bend in 11/16" tubing.