Why it worked
The video leverages the 'unboxing' and 'new tech' curiosity gap, using a catchy, albeit technically incorrect, nickname to drive engagement and comments.
Summary
The creator shows off their new foldable phone, which they refer to as an 'iPhone Duo', demonstrating the folding mechanism and the screen interface.
Product placement
iPhone Duo (a nickname for a foldable phone, likely a Samsung Galaxy Z Flip or similar device, which acts as the subject of the video). The device is operated by the creator to show its folding mechanism and display. Removing it would remove the entire subject of the video.