Any video editing task depends on what type of video it is (documentary, music video, industrial/business, TV show), what style will be used, will it include extensive animation/effects/titles, and so on. The ultimate sacrifice one has to make as a video editor is time.
Then there's reviewing the footage (looking at all the shots to choose which ones you will use), color correction, and any modifications you may want to make such as speed changes, re-framing by zooming in or out, moving left, right, up, down. There are a lot of hours spent behind the desk, on the computer, in bringing out the vision behind the video. The amount of time video editors spend on searching for music and sounds is also massive, especially if it involves a lot of sound effects. Getting the footage into the computer, selecting the shots, deciding on the kind of transitions to use, selecting music, editing audio, etc. would all be time in addition to assembling the piece in the timeline. The distractions that we have while editing like our mobile phones to the the time we waste in re watching the videos in the timeline over and over again also add to the already time consuming process of video editing.
In a video posted by Matti Haapoja, he takes us through few key things that would speed up the editing workflow and shows us his workflow so we could understand how me makes his edits faster for his style of work.