Treat a filmed phone display, fingers and glass reflections as separate visual layers. Track the replacement content to the display surface, place the foreground hand above it, and preserve suitable original reflections where they belong. A single rectangle pasted over the whole phone will erase evidence of touch and glass.
Identify the receiving plane
Use features belonging to the phone's display or bezel for the screen track. A moving fingertip is an occluder, not a stable screen anchor. Adobe's tracking documentation describes four-point perspective tracking for suitable planar surfaces. A track following the screen does not automatically create a foreground hand mask or preserve reflections.
Keep the original clip and replacement screen source. If the video demonstrates a real interface, use authorized actual interface footage and record what it represents. A decorative invented interface should not be presented as a successful demonstration of a product feature.
Build the layer relationship
Start with the original footage as the base. Put the tracked display content over the screen region, then retain the relevant original finger and phone edges above it. Reflections need a reviewed treatment that makes the display look behind glass rather than printing the reflection into the interface itself.
Avoid applying one broad mask that includes the hand and then painting the replacement across it. Check the mask where a fingertip touches and leaves the display. Where no trustworthy original reflection can be separated, simplify the shot or accept a clearly creative treatment rather than claiming exact preservation.
A hypothetical product tutorial shot
Suppose a finger taps a button, travels across the screen and lifts away while the phone tilts. The replacement source shows the intended interface action on a matching timeline. The review focuses on the touch instant, the largest hand overlap and the strongest glare.
At the touch instant, the finger must remain in front and the button state must change in the planned order. As the phone tilts, the screen must stay attached while glass highlights remain plausible. This is an illustrative review plan, not a tested reconstruction or proof that the demonstrated software worked.
Check time, edges and evidence
Play the clip normally, then inspect the critical overlap frames. Look for a replacement leaking onto the bezel, a bright outline around the fingertip, or a reflection suddenly stopping at a mask boundary. Verify that the interface does not respond before the shown touch unless that timing is intentional.
Accept the replacement when content is geometrically stable, touches remain readable and the represented action is truthful. Reject a technically smooth image that contradicts the claimed product behavior. Save the original demonstration separately for comparison. These procedures require the actual external editor used for tracking and masks; they do not imply that Imagild automatically preserves every finger or reflection during a whole-frame generation.
Sources
Prepared by Imagild Editorial with AI assistance and reviewed against the linked sources on October 13, 2026. Examples are hypothetical; external procedures do not establish Imagild features or guarantee results.