Being a cyclist is a lifestyle. Being a fixed-gear cyclist is not. The guys in the video are cyclists that prefer fixed gear bikes.

Just like being a runner is a lifestyle, and being a runner that prefers marathons is preference.

There is no need for fg riders to segregate themselves...which seems to be exactly what they were trying to do in the mid 2000s by refusing (or resisting) the accouterments of normal cyclists (e.g. clipless pedals, cycling shoes, water bottles, cycling kits, ...) that were all purely functional items that solved real daily problems, but were still avoided like the plague.