(Not the author) I like Git for the decentralization and ease of someone backing it all up. Agree that there's a huge usability cliff for anyone outside our circle that wants to contribute.
Maybe a good add-on project for someone is creating a website where potential new incidents can be submitted and evaluated, then pulled into the repo automatically if they pass muster.
If Reddit wasn't censored, you could use that, but you'd need moderators to manage duplicates and spam. Backing up Reddit pages / posts / videos should be fairly straightforward. If anything it's a lot more accessible to anyone because you can e.g. post from mobile.
Maybe a good add-on project for someone is creating a website where potential new incidents can be submitted and evaluated, then pulled into the repo automatically if they pass muster.