edit video clips in Photos or linked from Photos

When I play slideshow within Photos consisting of photos and video clips (from my Garmin GPS car camera), the video clip audio is irrelevant and annoying. Is there a simple way from within Photos to edit out or suppress the video's audio track without resorting to iMovie? I know I can turn down the audio from the play controls on each individual video clip while it's playing, but that doesn't persist. I would like a simple video editing extension to Photos so I can edit the video file in place without exporting it, editing it with a complicated video app like iMovie, and re-importing it into Photos.