Thanks for doing the maths - it does seem the sampling method would not be feasible. Taking the statistic of "500 hours uploaded per minute" and assuming the av

Thanks for doing the maths - it does seem the sampling method would not be feasible. Taking the statistic of "500 hours uploaded per minute" and assuming the average video length is 10 minutes, we can say about 1.5bn videos are uploaded to YouTube every year or 15bn every 10 years. So it seems likely that YouTube has less than 1tn videos in total.