In the 70s and 80s, broadcast quality video recording was done on large and heavy equipment - 'high band U-matic'?. The cameras would have been heavy enough on their own, but they would also have to be tethered to a tape deck which would be substantial. No such thing as a 'broadcast quality' camcorder then.
The same went for news, until the early 80's all (non-live) news actuality was shot on film. It had to be brought back, developed before being edited and broadcast, the turn around time for a piece of footage was sometimes days rather than minutes. In the early 80's all the TV news operations started moving over to 'Electronic News Gathering' (ENG) using tape formats like Umatic and Betacam