That’s because the button you tap to expand a video—you know, the one with the two little arrows—doesn’t shrink the video once you’re in “full-screen” mode.
Instead, the button with the arrows makes a full-screen video expand even further, hiding any black “letterboxing” bars at the edges of the screen.
If you actually want to shrink a full-screen video back to size, you need to tap the “Done” button rather than the button with the arrows.
Kinda confusing, if you ask me.
Well, here’s a trick I recently learned: instead of tapping a button to expand or shrink a web video on the iPad, just try pinching instead.
Once you tap the “play” button on a video embedded in a web page, you can pinch “out” with your fingers to expand the video to full-screen mode.
(Tip: Make sure to pinch the web video in a quick motion to expand it; if you pinch, hold, and slowly open your fingers, you’ll expand the entire page.)
Ready to shrink the video back to size? Pinch “in.” (The pinch-to-shrink gesture doesn’t require nearly as much finesse as the pinch-to-expand gesture does.)
That’s a lot easier—and way more intuitive—than dealing with the arrows and the “Done” button.
The pinch-to-expand and pinch-to-shrink gestures also work (quite nicely) in the YouTube app for iOS.