It is a perfect 90°, which ... is bigger than 90° degrees, but doesn’t reach a straight line at 180°. You can use a protractor to measure and draw angles. It has a clockwise and an anti ...
You can set the rotation angle to 90 degrees clockwise or anticlockwise, 270 degrees, etc. If some video is upside down or its orientation is portrait or landscape and you want to change it ...