I would like to suggest learning about a feature in video editing called "Normalize". Depending on your software it should be in audio or mastering settings. Normalize will automatically adjust audio levels for the entire video to keep the average db level similar with all clips.
In the software I use its usually set it to 93db but I believe the default is 89db. Processing time should be quick and this step is normally done at the final render at the end of editing.
If used correctly it will remove the need to set audio levels for each clip which can be time consuming.
It also makes it so listeners do not have to adjust their audio levels throughout the video.
Hope this helps.