Apple sells iOS devices that come in 16GB, 32GB, 64GB and 128GB, but what about the Apple TV 4? Why only 32GB and 64GB? Apple figures most Apple TV customers will just stream content via DLNA/UPnP or use home sharing for content we purchased on iTunes. So the internal storage is to just store apps and data.
Beamer is a Mac app that brings AirPlay mirroring to Macs, but is specially optimized for (and tops the native OS X mirroring in) streaming movies to your Apple TV (read our full review of Beamer 1.0 and about their 2.0 update, which brought a great interface and some cool new features). Recently, Beamer 2.1 was pushed out dealing with some of the most demanded features.