A Hybrid Gallery is a Gallery that utilizes a combination of portrait and landscape-oriented App Preview Videos /Screenshots.
In the iOS 11 App Store, there are three types of Hybrid Galleries:
- A Hybrid Gallery without an App Preview Video, which utilizes a combination of portrait and landscape-oriented Screenshots
- A Hybrid Gallery with a landscape-oriented App Preview Video and portrait-oriented Screenshots
- A Hybrid Gallery with landscape and portrait-oriented Videos and portrait-oriented Screenshots
For more information on how Hybrid Galleries appear in Product Pages and Search Results Pages, see this.
In Google Play, there is only one type of Hybrid Gallery. Since Galleries only have Screenshots, a Hybrid Gallery is a Gallery with both portrait and landscape-oriented Screenshots.