*Note* I originally posted this on TOMT on Reddit but didn't get any answers. Figured I'd have more success here. I also found out that "Spank the monkey" mentioned later in this post was from earlier than I remember.
In the mid 2000s I remember an old Jumpscare video that started off as a video that explains what ghosts are and how to find them or along those lines... I remember a picture of a ghost boy standing in a doorway with a dog i think. At the end of the video a video feed of what seems to be an abandoned bathroom with the door open plays for an extended period of time from the perspective of a camera in the top left corner of the room until the camera in the corner of the room is rushed with a multiple of ghosts and the usual Jumpscare scream. I was terrified by this and I remember drawing the ghosts on notepad paper because I was scared. Also if it helps with the timeframe I remember that I used to laugh everytime my older brother played the flash game "Spank the monkey" on the same computer. The Ghosts themselves I remember to be similar looking to the ghost from the ring but with no arms or legs just a head and a sheet underneath the head.