you could use a ceiling mount if you put the computer on your back and only thing in the ceiling mount is a extension cord in a counter weight pulley.
the dans case you did a vid on with a backpack frame and a pole to hold the extension cord will work, the weight of the backpack system would only be like 10-15 pounds and a lot of the weight will be held up by the backpack frame. much easier to get out too all you would have to do is unbuckle yourself.