Was the Florida shooting another False Flag?

As more evidence pours in regarding the Florida shooting, it appears very suspicious.
Here's a youtube video that I've recently come across of a teacher-eyewitness that crushes the official story.
https://www.youtube.com/watch?v=cPvYxTa1ph4

And here's another video regarding the numerous Active Shooter Drills, with students being made up with gun shot wounds & fake blood.
https://www.youtube.com/watch?v=L-LI-CILcYc

Comment below,
Newq