DIY Video Switch by Konrad Zientara

https://www.youtube.com/user/wsadhu
"This video shows my first tests of analog video switching in sync with music.
The analog clock pulses come from arduino programmed to convert midi input to analog signals (CV, GATE, CLOCK, RUN/STOP).
The video switch itself and the output monitor have no v-sync therefor images in screen tend to be verticaly shifted. It should not be a problem with most modern signal recievers,
thou for fast switching a digital syncing of all signals can be added"

Modified Crosspoint Production Switcher

Here's a fantastic video from tom16mm the goes to show older tech can still compete with software especially in a stable studio environment. The speed at witch the waveform reacts to the audio is still impressive. What you gain (in my opinion) by using hardware is organic interaction and more chance discoveries.

Panasonic Switcher & Camera Contollers

Panasonic Switcher & Camera Contollers Via mediageek on flickr 
ooooh! chrome and 70s looking, with retro potentiometer and slider caps.... sexy (well as sexy as video equipment gets anyway)

(taken from flickr)
"The video mixer is functional, but all analog. You can reproduce many of your favorite effects from the best early 1980s music videos. "