This video which I had linked to my Twitter account was blocked after having been retweeted many times, on supposed "copyright issue" which is YouTube's way of censoring material deemed damaging to the establishment, in this case the "Remain" group in British EU referendum. I managed to find it again and retweeted it, this time more subtlety. Here is the video in question.
One can see why some might want it removed.
Here is a second link as insurance, not that it will make any difference should it be removed again but will try anything once in the vain hope one can defeat the system!