I would like to inform you that this youtuber creator declared that he was using a modified version of MarlinFirmware to be able to 3D print with a MIG/MAG welding machine when I proceeded to inform him in a comment that the "secret" code he uses is a code released by the GNU GPL v3 and that should release the code and make it available in accordance with the license itself, proceeded to remove my comment.
The video where they admit that they use Marlin firmware