video streaming PC vs Android topic

hey guys,

basically ive noticed that when im stream a video from my nexus 5 to my chromecast the video streams straight to the chromecast rather than stream to the nexus and then to the chromecast. In the same way that when you use the youtube app it casts directly. My question is, is there any way to have this arrangement from my mac/PC.

the website in question is a popular movie stream site.

cheers in advance