I made a tool to copy your images between Mapillary and OpenStreetCam: https://osm.svimik.com/photosync/   Log in with both Mapillary and OSC accounts Press both ‘Load sequences’ buttons to fetch the lists Select sequences to transfer Press the ‘Transfer’ button. It will take a minute to start The transfer will happen on the server side, you may close the tab  Right now it works in one direction only, but I can implement the other way too if I see interest.