Just watched the video, and am rather shocked by it. I am glad it ended well, in that you were not hit, and I am also glad you posted this online and to the police. In London there have been several deaths caused by HGV drivers, to think that one could kill pulling a manoeuvre like that then get off either scot-free (no pun) or serve less than a year is sickening, although this has happened over the last year.
I have one request: could you edit your initial post and link the video there. Whilst it does not take too long to dig through the comments, it will make it easier for others, thus more will be likely to watch it.