These videos are encoded in various formats supported by **VrVideoView**. See
the javadoc for **sdk-simplevideowidget**'s **SimpleVrVideoActivity** class for
information on how to view these videos.

* **congo.mp4** is the default video used by **sdk-simplevideowidget**. It is an
equirectangular projection with **top-bottom** stereo.

* **sphericalv2.mp4** is a [Spherical Format](https://github.com/google/spatial-media/blob/master/docs/spherical-video-v2-rfc.md)
video with **top-bottom** stereo.

* **hls/iceland0.ts** and **iceland.m3u8** are part of an [HLS](https://en.wikipedia.org/wiki/HTTP_Live_Streaming)
video using equirectangular projection with **top-bottom** stereo.

* **dash/congo_dash.mpd** and other **dash/congo_XXX** files are part of a
[DASH](https://en.wikipedia.org/wiki/Dynamic_Adaptive_Streaming_over_HTTP)
video. The video uses equirectangular projection with **top-bottom** stereo.