Some really great advice here, generally anything i've learned is through tutorials but also you'll develop a sense of what effects to use and when, videos where the editing stands out usually emphasise the purpose of the video, for example funny moments videos only containing the most relevant footage to keep the focus. Or for example the frankie videos where he adds cinematic shots, numerous sound effects etc to increase the atmospheric feel of the game to achieve a more movie like state. Basically a big part of editing is not just what you know but knowing when to apply it to avoid the editing taking away focus or relying on editing to make up for a lack of focus