[TOMT][MOVIE] Possible Lost Slender Man Movie?

Decided to pop by this reddit to see if anyone has information on this.

Only vaguely remember watching this film on tv when i was a kid, pretty sure it was a chinese film. I only have memory of a few scenes and thats it. I believe the movie has a slender man type entity and it only appears near the end of the movie. Its tentacles opens up and the screen starts breaking up and the movie ends. Also remember scenes of slenderman being locked in a cage and kids laughing at him, which probably is the reason why he kills kids in the movie. The way the movie was shot felt like a found footage movie iirc and i believe there was a female reporter/character that the camera follows.

[TOMT][MOVIE] Possible Lost Slender Man Movie?