I liked this way more than I was expecting to.
There's no way dial-up with this fast and reliable BUT considering it was probably the first time internet chat was used as a horror setting (happy to be contradicted!)- it really works.
A really obscure film, the acting isn't too bad at all from a small unknown cast and the building sense of dread is really effective.
If you can find it (I think it's still on Prime) and you're a fan of found footage horror, it's worth a watch.