Technical overview of current features

Combine videos with AVMutableComposition
add CALayer to AVAsset with animation with CABasicAnimation
add CIFilter
add sound
export video to Photo Library

Auto scroll assets when video is playing

autoscroll.assets.MP4

UILabels sticks to the corners of the screen, and stays inside it's superview, by adding the next constraints:

UILabels have constant greaterThanOrEqualTo the first UIView of UIViewController (leadingAnchor) and .left and .right constants to UILabel's superview see in the file: https://github.com/mishadovhiy/videoEditor/blob/main/VideoEditorUIkit/NSObject/UIView/AssetAttachmentView/AssetRawView.swift#L53

Manual scroll - performs seek in the AVAsset

manual.scroll.mov