[vikingerik]

One thing that makes a radio-TV combination work less well nowadays is latency in the TV feed. Running 15 to 20 seconds or even more behind the radio is not uncommon with all the processing and distribution layers that go on with a modern video feed. I've heard of setups where someone plugs a radio receiver into a computer with software to buffer and apply the same delay.

[IIsi50MHz]

Also, the mandated delays in USA for TV and radio to allow censoring (and thereby reduce the risk that Something Untoward is enacted on a live broadcast) . IIRC, radio has a 10 second delay, while TV has a 30 second delay. This allowed a Lt. Col. I knew to hear the conclusion of any play before the television image was even close to definitive. Even with "pure broadcast" TV and radio (no digitising, no cable, no satellite…). Processing delays, such as for DVR or streaming, only add to the overall delay.