Video docking requests

[wassgha]

• Prevent docking if the minimized video's height is going to end up bigger than the viewport height
• Handle videos with height bigger than their width
• Add dock-corner parameter that overrides the default docking corner
• Add dock-scale parameter (0 to 1 non inclusive)
• Add snap-element and snap-pos (outer/inner) parameters for snapping the docked video to specific elements
• Use fixedLayer (or signals?) to detect fixed position amp components and adjust the docking area accordingly
• Add a maximum width/height for minimized videos (on desktop, 60% of the original video can sometimes be very big)
• Ability to dismiss while docking
• Tap on an empty area to hide controls
• Maybe show controls when the videos finishes docking to make users aware of interactions methods
• Fix bug with controls not appearing
• Resize event waits till user no longer tapping (use position observer)
• If we come back from fullscreen then the video should stay minimized
• Dock autoplaying videos
• Add minimum of 200px and a maximum as well as attributes to control them
• Make dismissing the video more sensitive
• Fade out as you're going outside of the viewport to indicate dismissing the video
• Make video continue scrolling if halfway (or just minimize to corner without scrolling)
• Use placeholder to display instructions on how to interact with the docked video
• Expose the undock action
• Expose CSS for placeholder
• Only show gray overlay once docking starts
• Set docked video's z-index to be the second highest after amp-sidebar

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This issue doesn't have a category which makes it harder for us to keep track of it. @wassgha Please add an appropriate category.

[ampprojectbot]

This issue doesn't have a category which makes it harder for us to keep track of it. @wassgha Please add an appropriate category.

[ampprojectbot]

This issue doesn't have a category which makes it harder for us to keep track of it. @wassgha Please add an appropriate category.