Is English your fourth language perhaps? You appear to lack the listening comprehension skills which would be necessary to get past the fifth grade in the United States. How are you in college?
The "boyfriend" was captured by police for an unknown reason. There is nothing to suggest from the video clip that he was publicly "admitting" to anything. The video then tells us that under "interrogation," (in other words, torture) the "boyfriend" gave up Kazemi's name. An arrest warrant was then issued for Kazemi. Kazemi found out about this and sought asylum in Britain, where he was studying.
You fail to comprehend that Kazemi did not "flee" Iran. He left in 2004 to study in Britain, and found out about his arrest warrant two years later during a phone conversation with his father.
You apparently are thinking of Kazemi's 2007 essay in a New York newspaper, which the CNN reporter speculates makes Kazemi's case too high-profile for Iran not to kill him. However, the Iranian arrest warrant for Kazemi was filed in 2006, a year before Kazemi wrote the essay.
I am astonished that you are continuing to argue your case still without having any comprehension of the basic facts. If the video is too confusing to you because of your difficulties with spoken English, you really owed it to yourself to buttress your knowledge with written sources before attempting to debate somebody who is not so cognitively deficient as yourself. Obviously, since you are posting in this forum, you have access to the internet, and could have learned about the case by entering a few keywords into a search engine.
Remaining sanguine on your prospects for success in life is difficult given these glaring deficiencies in your ability to process information, and your further inability to recognize these deficiencies. I advise you to seek remedial assistance at your place of learning before it is too late.