Less video resolution to save disk space
Full HD quality consumed too much space, 1080x720 is enough.
In version 1.3 and newer you can tap on resolutions to change it (like 720p). We will change it a bit in 1.4 – it will show only supported resolutions for your device (like 4K on iPhone 6S and newer).
A 720p (1280x720) option would be a very useful resolution for people with smaller storage limits on their iDevices but wishing to obtain better quality than 480p.