This plugin adds a USB connected GoPro webcam option to OctoPrint. For this plugin to work a GoPro Hero Black 9/10/11/12 has to be connected by USB to the same server OctoPrint is running on.
Install via the bundled Plugin Manager or manually using this URL:
https://github.com/amirlanesman/octoprint_goprowebcam/archive/master.zip
Just enter the last 3 digits of your GoPro and you're good to go. Select the GoPro as your snapshot provider in timelapse plugin.