“Will it work through the cable box? I went to the BB store to purchase the unit. Clerk advised me it wont work the way I want it to. I have a cable box attached to BR TV. I want to record my son's televised baseball games. Clerk said the cable company and legal issues will prevent me from being able to set this up that way and it will be extremely difficult to do. I wasn't sure of his knowledge and thought I'd check here before buying it.”