One thing that's interesting in that video is that soon after reaching Google from her Private Browsing window, the reporter gets shown a little panel in google.com that tells her that they've noticed she hasn't logged in in 6 months.
Bug 1779280 Comment 2 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
One thing that's interesting in that video I saw is that soon after reaching Google from her Private Browsing window, the reporter gets shown a little panel in google.com that tells her that they've noticed she hasn't logged in in 6 months.