What's the quickest way to stream content to android from PC?

cloudropis

Honorable
Jul 17, 2013
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... that doesn't involve apps with shady desktop clients?
An example of those is airstream, that has these issues: http://www.zrtechnologies.com/content/review-and-security-concerns-airstream-app

I looked around a bit, a viable alternative seems to be making my own media center like this:
http://www.howtogeek.com/215400/how-to-turn-your-computer-into-a-dlna-media-server/
Since I would only stream .mp4 files would this be a viable option? Do I need to do port-forwarding or mess with my router/network in any way?

Lastly, I heard a lot of good things like plex. What is it and how does it differ from a media center?