"One Click Root for android"

Hello everyone, yesterday i'm was with my 5.0.2 stock firmware with root and finally got some balls to update it with the "pre-root" method and everything's work's so bad, after install recovery, and did all the wipe's, I went to install the pre-root zip, and comes, crash after crash, finally, I use my PC-Companion to revive my cel phone, but now, it's 5.1.1 with no root (this is totally bad) So, searching in the internet to collect all the methods and try to use the better explanation, i find this video, and this site, I really think it's just a flammer or something like it, but, i prefer try, because i'm afraid to do all again and do the same crashes and again and again and again..

Humm, i'm seeing that i can't post links because i'm newbee here, so, the video is the 1 if we search:
How To Root Sony Xperia Z3 D5803

And the link for the site is in the description, it told to enter in a site, plug the cel phone and click in one button.

Ty guys, i will w8 for some answers.

PS: sorry about my bad english.