Anne has the Amazon Fire TV but it keeps freezing up while watching the Tech Guy Show. Leo says that it's more likely the internet stream rather than the Fire TV. Streaming over the internet is still bleeding edge technology that doesn't always work best. Apple even had issues during their the internet stream of the iPhone announcement.
Freezing may also be an issue of bandwidth. Anne may have inadquate bandwidth for watching HD streaming. Leo suggests connecting the Fire TV through a wired connection to the router. That would eliminate any interference. But if someone else is watching online, then it could affect it as well.