You can share media files between your smart phone and tablet.
Casting your content to the big screen playback.

Features:
Support Chromecast WebVTT subtitle.
Support AppleTV AirPlay.
Support UPnP/DLNA DMC DMS and DMP functionality.
Support Media Services content Downloads.
Support srt subtitle.(only Android 4.1 later the same as the movie file name of each path)

Support Media Formats:
Android version and hardware dependencies.
http://developer.android.com/guide/appendix/media-formats.html
Chromecast support format
https://developers.google.com/cast/docs/media