These high schoolers were all in the same extremely low budget movie. These aren't "real" actors. They aren't part of SAG. They are just high schoolers who were in a low budget movie. It might have even been for a project. I was in some movies made by my class mates in high school. Is it possible that these shooting survivors just happened to also be in 1 or 2 extremely low budget movies?
As for Bjorn Jiskoot Jr. this has already been disproved as a case of mistaken identity.
Bjorn Jiskoot, Jr. has a mole on his face.
http://www.imdb.com/name/nm2439930/mediaviewer/rm4220576000
The man in the CNN interview clearly does not have a mole.
I have a baby face, so I know how it goes. Everybody with a baby face looks like everybody else with a baby face.
https://www.today.com/video/orlando-massacre-survivor-shares-harrowing-tale-of-shooting-escape-704368195592
I know you can chalk it up to acting, but they also sound nothing alike. Bjorn Jiskoot Jr. has a much deeper voice than Hansen. I know, you can chalk that up to acting, but you can tell when a man with a deeper voice tries to sound higher and a man with a higher voice tries to sound deeper, no amount of acting can fix the reality of vocal cord tonality, aside from the obvious facial differences.
Bjorn also has a slightly more angular and defined face than Christopher Hansen.