2008 Yaris knocking/rattling sound near drive belt

[avs262]

I have a 1.3L Yaris manual transmission that is knocking/rattling near the drive belt. I've searched around on here and found that this could be caused by the water pump so I replaced the water pump and drive belt last night. The water pump did have antifreeze all around it so I thought for sure that was the problem. After replacing I fired up the engine and the problem continues. I've taken a video (https://vid.me/VLYv) so you can hear the noise - has anyone experienced this? My next step is to go buy a stethoscope. Any other ideas would be greatly appreciated!