Is it a coincidence?
Probably not.
It must be artificially arranged.
But... why would the other party do this?
Murder?
The 'Cursed Videotape' is indeed a lethal weapon for murder, and can even be said to kill invisibly, and it's highly likely to kill even the ordinary people from the 'Mystical Side' if they come across it unintentionally.
But, the 'Cursed Videotape' also has various restrictions.
Not to mention other things, just the need to see the 'picture' severely limits what can be done.
Unless it's someone like Shimura Tetsuya who murders his own friends, and moreover, these friends are very interested in 'ghost stories', 'urban legends', but are not really from the 'Mystical Side'.
And the person who 'gave' Shimura Tetsuya the 'Cursed Videotape' must be from the 'Mystical Side'.
The person they want to kill would naturally also be from the 'Mystical Side'.
But is this useful?
Isn't this a bit of a roundabout way?
