I got recently an action camera which I used to record recent trips abroad for mapping one country I've worked on a long time.

Pros (or con?): huge amount of data is available on a video. A week long trip resulted about 120GB of HD 720p quality video to support the traces. That will take a long time to go analyze!

When I leaved I had no idea how to use the video but I was sure I'd figure out some way. After returning with a lot of data I found out there is a videomapping plugin for josm (not finished) but unfortunately it work with Windows only I guess.

Not being a programmer I was short of tools. No way I'd quicly learn java to improve josm. So, I did a script to export pictures every second, timestamped them and used them in josm along with traces. Works ok, but split second details are not available unless I watch the video on anoter tool. I lose the audio detail on it as well. Still a great means for mapping, no more missing details as is usually is with a camera or when using traces and memory.

As video equipment is getting very cheap, I home well see some video support in Josm one day.