Riding Zone is a popular extreme sport channel in France (more than one million sub on Youtube) who has been around since 2007. They produced a really interesting documentary about rollerblading available on Youtube (PLAY) ; the Youtube version is 9 minutes long and the full version is available here (24min), unfortunately behind a paywall (disclaimer: this link is not affiliated).

The documentary features interviews of Stan Kogutyak, Chris Edwards, Toto Ghali, Taig Khris, Wilfried Rossignol and a ton of relevant rollerblading content.