lambies era was videos, dick Campbell never watched videos as he had a photo memory of every game ,
McCall was the same he used to throw videos straight into the bin,
rangers have had a guy doing this for years as Celtic , for instance when they play us they will look at our last game ,
free kicks, corners, set plays and how we set up during the game then on the day before match the guy would tell the players what we do so they have a head start before match days, lots of clubs have it now mostly thru collages etc. . you can do it on the cheep with one camera up to eight