you've posted up a link to a youtube video entitled 'Student Demo London - Top Shop windows getting smashed'.
While the motivation for targeting topshop windows may well have been inspired by the uk uncut protests drawing attention to their tax avoidance, it's got fuck all to do with the actual UK Uncut organised protests at which AFAIK no windows have previously been smashed, or stock trashed, so it's out of order to suggest as you do that this would be the likely result of todays protests.
to suggest that it doesn't matter who's organised a protest as to the form that protest is likely to take shows you have zero understanding of the history of protest movements in this country, never mind what's going on today.