Complex sentence: The hooded skateboarder turns out to be "Trip", one of the roadies and goes into the back of the stadium into a parking lot where the people who run backstage are handling equipment and getting things ready for the show.
Split into simpler sentences: The hooded skateboarder turns out to be "Trip", one of the roadies. He goes into the back of the stadium, into a parking lot where the people who run backstage are getting things for the show.