Most the actual fishing programs are on free to air tf as it is save for BTs on the bank. I'd imagine fishing tv is decent but I'd doubt that it's much better than what you get on YouTube for free. If you just want to watch fishing and are not bothered by what type then waypoint tv is a good app. It's all US and Caribbean based but it is free and there's tons on there.
Most of the films I've been watching lately have been made by tackle or bait companies, and are free on YouTube. Sticky Baits did some interesting films called Reflections...if you're into Carp fishing.
Amazon have got the first 2 series of On The Bank and Catching the Impossible. The latter I found to be brilliant.
A few anglers have there own separate channels where you can subscribe for a cost and they share more with the viewer, Jamie Harrison and Paul Holland are two anglers that do this off the top of my head.
Loads of other programes on there from years ago that i am sure you will appreciate ,just type into the search whatever and you will be amazed what you can still watch from years ago as well as shed loads of Angling