Speaking for U.S. law, you understand copyright wrong. The fair use doctrine allows for use of copyrighted works for the purpose of "criticism, comment, news reporting, teaching, scholarship, and research".
Part of the criteria for determining if use of a copyrighted work is fair use includes the "amount and substantiality of the portion used in relation to the copyrighted work as a whole", so, for example, if I were to post a Vine video of a goal, along with commentary like "Manchester United played a great game today, with three goals including this exciting one by Bob Smith", then I am (your pick) commenting, critiquing, or reporting on the entire hour and a half game, while posting a five second clip of that game. In the U.S., that is clearly fair use unless the other side's lawyers have more money than you do.
I realize this story is about England, but I'm relatively certain that every Slashdot commenter including the parent is discussing this in terms of U.S. law, so I did as well.