The role of Video Designer is to create a video and work with the appropriate people to get that video to reliably play during a show.
The context of a video varies wildly depending on the show in question, but here is some general advice that may be applicable.
If the video requires actors in costume, coordinate with the costume designer as soon as possible to figure out when to film those.
The MIT New Media Center (26-139) has computers with the entire Adobe video suite (Premiere, After Effects, etc.) as well as the entire Final Cut suite. It's accessible any time so long as you're an MIT student.
Full instructions are in a pamphlet in the projector bag, but the basic steps are:
The Ensemble doesn't have any long HDMI cables, but MTG has 50-foot and 100-foot ones that they have loaned us in the past. Thread it through the mounting cylinder to avoid pulling it out of the port on the projector.
The projector has a remote control. KEEP TRACK OF WHERE THIS IS AT ALL TIMES. If you turn your back for five seconds, it will elope to Austria with that drill bit you're looking for. The remote control can be used to distort the projector image, and also turn it on for the duration of a performance.
For Lear and She Kills Monsters, we used Isadora to output video. Isadora is amazing video software that can take MIDI cues from qlab over an ethernet connection, and thus allows for video and audio cues to be synced. However, the free version doesn't let you save, so using it means either finding someone with a USB-key license or leaving it open for the entire production (risky, but doable for short productions or simple setups).
Ensemble owns a small router and short ethernet cables that can be used to set up a LAN between a laptop being used for video and a laptop being used to send cues.
There are lots of things that can go wrong with video. Make sure you're there before every show to set things up - make sure everything is plugged in, turned on, and if possible run through the cues with the person in charge of that.