@Onethumb: I have ~150k photos on Flickr and a 10 year paid account but I stopped using it ~1.5 years ago when I got sick of their video upload timestamp issues. I have not checked recently if fixed.

When I upload photos, Flickr looks at the taken date of the photo and sorts them that way. When I upload videos from the computer (using the upload tool), Flickr does NOT look at the metadata to set the taken date. Instead, then taken date is set to the current date meaning the videos are out of order of the photos.