How foldable devices change video composition.
Design for viewing modes and content priorities, not a single new aspect ratio.
One device can have several viewing states.
A folded phone, an unfolded display and a split-screen application can present different usable areas. Device ratios vary. Define the supported screen geometry and orientation for the actual experience rather than assuming every foldable uses the same ratio.
Use the extra space deliberately.
A larger surface can show a speaker and supporting footage together, or preserve action with contextual information. Simply enlarging a portrait crop may miss the opportunity to create a more informative composition.
Protect continuity between states.
Changing the layout should not lose the subject or hide key graphics. Test how the player handles size changes, captions, controls and safe areas. Decide whether alternate renditions or dynamic layouts fit the publishing environment.
Retain source flexibility.
Keep high-quality originals and the understanding metadata that identifies important regions. A reusable source and composition rules are more adaptable than a single flattened derivative.
Start with the destination, not a ratio list
A 16:9 broadcast may contain a wide studio desk, supporting footage and a lower third. An unfolded screen can use several content regions, while a narrower display may need a stacked layout. Specify the actual display area, player controls and caption safe areas before choosing the composition.
Review transitions and reading order
Test studio panels, cutaways, action, replays and full-screen graphics. Check which region receives attention first and whether a layout change interrupts the story. The foldable demonstration shows the type of adaptation; production rules should be evaluated on your own source material.