DOS is the primary interface on some of the instant-replay servers used for broadcast video. People know how to use it, after a decade or two in production. There are some more current web interfaces and client tools, as well.

Here's a manual with some fun screenshots from the EVS XT3 [1]. Apparently 196 of them were used together at the World Cup last year [2].

[1]: http://www.evs.com/sites/default/files/download_area/package...

[2]: http://sportsvideo.org/main/blog/2014/06/broadcast-asia-2014...