Optimal d.tube upload size... I need firends!!

I now am waiting till I work out how reduce the size of a video before I next post to d.tube. I have already used Handbrake but only reduced the file size from 450mb to 110mb. This seemed too much for the d.tube upload system.

Please, kind steemers, let me know what setting will reduce my 8 min video to about 20mb. Should I use a different preset, bitrate, frame rate etc?

See below.