Broadcasting/Streaming live to a Jumbotron

Has anyone streamed live during an event to a Jumbotron? I am looking for any advice for connections and
video setting. The plan is a straight forward HDMI in, using long cable to move about.
What about something like a Teradek Cube (encoder and decoder pair)?
Would free you of the cable restriction and give you sensible terminations?
Just feed the decoder O/P into the Jumbo.

Cube: Compact H.264 Codec for HDMI & HD-SDI Sources | Teradek, LLC - Wireless HD Video
 
I am considering the CUBE for October. Funny towards the of day everyone watched the Kentucky Derby after all. Thanks editor and Roger!