efv Advanced APP portrait-optimized player keeps portrait videos vertical in fullscreen

The player in the dedicated EFV Advanced APP is optimized for portrait videos. Many open-source APP players have limited functionality: fullscreen rotates a portrait video to landscape, leaving the video in the middle with black borders.

Example

Typical APP fullscreen behavior for portrait videos, especially in H5 implementations:

The dedicated EFV Advanced APP detects portrait video and instead behaves as follows:

The current video is portrait.

After tapping fullscreen:

Conclusion

This APP supports not only films and series but portrait phone recordings, galleries/comics, articles, news and novels, making it versatile.