Best Program For Chromecast Link

[king1]

when you open the cast option in chrome there is a sources button, here you can select other options, like a file or the whole desktop...

These are the official supported formats for casting
https://developers.google.com/cast/docs/media

If the file type is not compatible then you could play it in whatever player you have at full screen and cast the entire desktop

You shouldn't need any other software, but just in case I believe VLC can cast now and since it plays anything that should do the trick also...