Owing to being human and having messed up I need to synchronise precisely two tracks - to the level of frame. Both are video and some of the content is identical (but one of the tracks has been “mauled” in a non-undoable manner. Its like grafting with tape, I need a section from one track to replace a damaged section on the other track. Both tracks have video and audio. They were originally the same source. Is there a neat way to do this ? The best I can think of is aligning the audio on maximum timeline expansion - is there another way ?