You probably don’t need this app...
First off, the app itself doesn’t work very well for me. It takes so long to buffer the video that it always catches up. It has not gotten through a whole movie without crashing. But the other reason it’s a waste of $5 is that it seems unnecessary. If you have the free chromecast extension for your chrome (which you need for this app to work anyway). I have found that I can take my video file (mp4, etc) and drag it onto the address bar of the chrome browser which will cause the movie to play in the browser. Simply cast that tab and voila! This has worked wonderfully for me with no skipping or buffering needed.
KannonDiCarpo about VideoCast for ChromeCast