videos stop getting views after an hour

hello, so I have an account with a video that blew up (370k views and counting) and the other videos didnt do as well, which is okay, but i noticed that all the videos i posted after stopped getting views after 900ish views and they'd get viewed only for an hour then nothing. Some of the vids had a really good ratio and got 900views in a few minute--so I'd expect them to do better but same old, its locked at 900. Does anyone know why that's happening and how to fix itN?