Recent content by Brian Haugen

"The ISP's network can only handle so much data traffic, so it has become necessary for them to apply data caps in certain areas" Comcast admits this isn't true. https://consumerist.com/2015/11/06/leaked-comcast-doc-admits-data-caps-have-nothing-to-do-with-congestion/

from the Product Description at the amazon page you linked: "Guaranteed 1080p, 1080i, 720p, 480p, and 480i Resolutions" So, it looks like it's a cable issue.