My video streams keep pausing and also repeating the same short segment 1,2,or 3 or more times. When streaming HD the problems are worse. Diffrerent streams may be better as usually lower resolution is better. Pausing varies with time of day. The freezing also happens when hard wired to the router (don't blame my wifi). Looking around the forums this seems to be a comon problem on Comcast. When I teather to my cell phone the pausing is certainly less. I would switch to 4G wireless except for data caps. In my immediate area Comcast is the only wired provider (no DSL or Fiber eg FiOS). My neighbor has the same problem.
I have tried every sugested remedy. I believe the problem is either peering agreements (like what happened to netflix) or network management (prioritizing packet type).