Android 5.0 vs Android 4.4 - Camera
With Android 5.0 Lollipop a new camera interface is on board. However, this was also updated on the Play Store so all older devices will still have the same similar camera experience. The on-screen navigation buttons dont fade on Android 5.0 like they do on 4.4, not as fast at least, so there's not much to see here.
Each device will have different options, and the Nexus 6 has UHD 4K recording in settings. The camera hasn't changed much, but new APIs should give developers more access and control to make great camera apps, controls, and bring new features or functions to Android cameras.