This is so French - sexy woman, a model, spends all day obsessing re the trial of a serial killer for reasons unknown.
The first half ratchets up the tension nicely. Then the subplot re the fellow obsessive and unlikely court scenes go OTT, rather, and I sensed the second act of the film was trying to waffle somewhat, to time-fill, stretch it all out a bit. The ending remedies that well with dramatic tension.
The techie plot re Red Rooms reminds me of several other internert-based films, and we're likely to see more of course. 8MM (1999) is one; PEEPING TOM (1960) always an influence though via the camera-age of film and projectors. Best internet film of recent years is the shoe-string budget horror HOST (2020).
3 stars overall