You're absolutely right, there sure weren't any smartphones, or at least not the ones we think of today.

I have a sort of unlisted version of the site that has been used in classrooms and museum exhibits: http://tv.911realtime.org

You can use the keyboard to navigate, and you will probably have to hit the spacebar on first load to get the player to play.

L,S: Louder, Softer -,+: Change Channel M: Mute