I take a fair amount of photos/videos during activities (walks and hikes in particular) that I often attach to my activity in Strava. However, the workflow involved here feels clunky, and I built an interactive prototype for a simpler and more engaging way to add media to your activities!
Here's how it could work:
On the activity view, a new "Add Media" card shows you the media that was captured during your activity. Simply choose the items to upload, tap Add [x] Items, and you're done!