Hopper 3 4K streaming problem

[Mandeville985]

ok, I know not much programming is available but I decided to stream a free 4K show. It gives me error 1518 insufficient bandwidth. My download speed is 67 mbps. The tech support guy told me to call my cable provider and ask if my bandwidth is good enough to stream 4K? He said my bandwidth should be measured in frequency and the Mbps is just my speed. Before I call my cable company.. Does this sound right?