If you actually watch the video before commenting on it... You can see that they are children because they're being led by adults.

Check out 2:10 in that white House video. That's when you see the kids. After maybe 5-6 kids walk out the front door, the camera zooms all the way back out really fast and the lighting changed and blinded the camera. It's almost like we were meant to catch a split second of what was actually happening at the WH.

If you actually watch the video before commenting on it... You can see that they are children because they're being led by adults.