Developer Guilherme Rambo says the videos are from May.
Yes, those videos are found deep within the iOS 11 beta image. Files are from May. They're probably from very early iOS 11 prototypes...
In the first video we see a swipe up gesture that activates the App Switcher.
In the second video, the Control Center is launched with a swipe left from the lockscreen.
It's unclear if Apple plans to use these gestures with its next generation iPhones; however, it's likely that there will be some navigation changes introduced alongside the new Home Bar.
Please follow iClarified on Twitter, Facebook, Google+, or RSS for updates.