Like your examples show, some videos of crime are in fact illegal in some places. It is however the videos themselves that are illegal, for any reason, not due to the mere fact that they depict crime.
The Christchurch shooting is a good example, the video had to be banned on its own, showing how such videos are not normally illegal. It had to be banned specifically.
And now we are back on topic!
Like your examples show, some videos of crime are in fact illegal in some places. It is however the videos themselves that are illegal, for any reason, not due to the mere fact that they depict crime.
The Christchurch shooting is a good example, the video had to be banned on its own, showing how such videos are not normally illegal. It had to be banned specifically.