OP said he doesn't "think it's technologically feasible for them to decrypt and then semantically process or store that much content" meaning it's more about ju

OP said he doesn't "think it's technologically feasible for them to decrypt and then semantically process or store that much content" meaning it's more about just storing the raw data. Assuming they could store it perfectly fine (which is a big 'if' considering Cisco estimated 7.7 Exabytes of data would be generated per day by 2021), they'd still have to decrypt all the videos, semantically analyze each video (subtitles, object detection, face recognition, etc), find a way to index that information to make it queryable, and run analytics on that data regularly. Ideally they wouldn't have to search everything when needed and could keep a running file on everyone (because lazily parsing data could be expensive and probably a waste on their existing current resources). That's not to say they can't do it, given that they probably have a huge budget, but it's also not a sure thing they can do it effectively for those who are trying to stay hidden.