The video showcases the range of what this game covers beautifully. Things to keep in mind; alpha "modules" are being released as progress permits (dogfighting currently available, fps should be released in September with the MultiCrew later this year), a 20-30 hour single player campaign will be included in the final release (release date 2016, it's chapter 1 of 3 with sequels intended to release 2017 & 2018) and a persisent MMO universe opens with the final release (game mastered & continually updated by CIG for ... hopefully the remainder of my life?).
Check out their website for answers to any other questions you might have, there are another 935,000 citizens on their forums so just ask if you don't see what you were looking for, some of those citizens play Fallout & Skyrim so link them back here so they can play those games the STEP way.
Watch the Star Citizen MultiCrew Demo, seriously, you won't regret the 13 minutes spent.