sure they will, if you use more and traffic is high, they will just throttle your speed, which slows down your video streaming
i still have a grandfathered unlimited data plan for my phone
i just bought a new phone samsung S4 retail from amazon
because galaxy nexus died
activated last week, getting great speed most of the time,
but it throttles down during high traffic hours, but heck i used 60gig last month
several weeks of triple digit heat, had me sitting inside streaming and downloading movies, including all ten episodes of Narcos from netflix
on amazon you can rent or buy and download to your mobile device , tablet, phone , PC etc,, havent tried the NEW free download yet