9.3 WCAG 2.1 Success Criterion 1.3.4 － Orientation

Unless a specific display orientation is essential, the content should be able to be viewed or operated in either portrait or landscape orientations.

Before Rectification

Users are unable to change the orientation of the video clip as the video player restricts its display orientation to landscape.

After Rectification

Persons with physical disabilities may mount the device on a wheelchair in a fixed orientation. By not restricting the display orientation, users can view the content in the orientation that suits them best.

WCAG 2.1 Reference:

https://www.w3.org/WAI/WCAG21/Understanding/orientation.html