The description of the Video Embed stack says “The embeds are automatically responsive”. The web page containing the stack responds correctly, but the stack itself does not. Using the default vimeo video (16x9 aspect ratio), it fits iPhone 8 (same aspect ratio), narrower iPads (4x3 ratio, narrower than the video), but the height overflows on iPhone X higher (19.5:9 aspect). The whole video doesn’t appear and the bottom controls are below the screen. See simulations for iPhone 8 & iPhone X.
In the latter case, the video should have resized to fill the height, not the width, so the full video would be visible.
How do I get this to happen?