Streaming movie from Galaxy S5 to TV, through laptop?
I'm not sure you can because there are many interfaces in the middle. I don't think there's an app for doing that. What I strongly suggest you is buying the Google's Chromecast. With that $35 stick you'd avoid the using of your laptop and you'd stream directly to your TV. 

There are a lot of apps for Chromecast out there, it's a whole new world because Chromecast is a whole new concept.

Videostream is one of the apps you can use for streaming from your smartphone or laptop directly to your TV (well, directly to your Chromecast, but it's connected via HDMI so it's the same) and controlling the play, pause, seekbar and even the volume.