WiFi is not up to the task of mirroring a display at the rate needed to play a movie.
And it appears you are confusing streaming a movie with mirroring a display. My background includes video work in DVRs, embedded systems and more.
I'd love to see anyone get a mirror app that could do 1080p over wifi to the speed that is needed but the lag time involved means those that wanted such are usually upset. That is, the GAMER is miffed and unhappy. The person that thought they could mirror the display to play a movie is also upset as the frame rates fall among other issues.
To fix this, you see wireless HDMI solutions. And that's not wifi and it's not "streaming."
-> Thanks for the replies but as the man said "Show me the app."