Follow the link below for the full version of Hauari & Hollingworth's study, from which the 2015 pre-release material is taken. Whilst it's not essential that you're familiar with the full study, it makes for very useful reading and will also give you more depth of the aims, objectives and findings of the study as well as more discussion regarding the issues faced. It also gives a huge amount more detail about the methods themselves and how they were used.
Although American, the crime/violence statistics provided in this brief documentary are very similar to their UK equivalents. Demonstrates how powerful the media can be in promoting a hegemonic masculinity - and the potential damage this can do to society.