The second link provided in the OP indicates that this was a real incident.I think it shows very well how fast an incident can develop, but I suspect this is for academic purposes only.
http://www.localnews8.com/news/thomas-receives-sentence-in-attempted-murder-trial/30737472
The article refers to the video.
Cvengros had a camera rolling to document the commotion after seeing glass flying from the upstairs apartment onto the cars parked below. He said once he heard unusually concerning noises coming from the apartment upstairs, he started documenting the commotion using his digital camera, not realizing that camera would soon serve as a witness to what was about to take place in his apartment.
The video was played during Thursday's sentencing, and in it, Thomas kicks in the door, and both Gearhart and Cvengros yell at Thomas to leave, warning him he needs to get out. After Thomas was shot, Cvengros tells Thomas he already called the police, and Thomas confirmed he was trying to kill Cvengros.
The video was played during Thursday's sentencing, and in it, Thomas kicks in the door, and both Gearhart and Cvengros yell at Thomas to leave, warning him he needs to get out. After Thomas was shot, Cvengros tells Thomas he already called the police, and Thomas confirmed he was trying to kill Cvengros.
Another video which links to the first and plays part of the video. It also includes an interview with the country prosecutor.
https://www.youtube.com/watch?v=0UXe9seMabc
I believe there's sufficient evidence to establish the authenticity of the video.