I don't know about the guy in the video and whether or not he was racist, but I do know that for the first few hours the vast majority, I would say over 90%, that I saw on the TV involved in these activities were black.
Then as time went by more and more white people were being shown looting.
There could be several reasons for this but most prominent being-
1 The black people shown only represented the proportion living in a predominantly black area where the rioting happend to take place.
2 The Media realised that the first few hours were showing the BEM community in a really bad light and so as not be accused of being racist, were told to censor what was being shown and started holding back images of black people at it, and play up the number of white people at it.
The proportion of BEM people convicted will tell you if they are disproportionately represented or not.
I haven't looked up the official stats so I don't know the figures but,
The evening standard tells us that-
Four out of ten rioters arrested in London were unemployed and 28 per cent were students.
55 per cent of rioters charged in London were black or mixed race. For older rioters, today's figures, released by the Ministry of Justice, show that 55 per cent of riot suspects in London were black compared with 32 per cent white and seven per cent Asian
Nearly one in five rioters in the capital were gang members.
93 per cent of riot suspects in London have been previously convicted or arrested