You can easily create a special player for vertical video. Just enable the
Settings / Size / container size
option and specify the container dimensions with the proportions of the vertical content. You can also enable the
Adapt to the video aspect ratio
option. In this case the player will change the height of the container itself depending on the proportions of the video.
You can disable the
Mobile / Native controls in fullscreen mode on iOS to prevent the player from losing your interface in fullscreen mode on iOS. But in this case, the browser address bar will be displayed on iPhones in fullscreen mode.
You can also enable the playlist control with the
Hotkeys and gestures / Swiping in the PRO version of the builder.
An example of such a player can be found in the free templates.