As a note, "ipodpatcher" isn't what installs the firmware. It adds a bootloader to a section of the disk. Rockbox on the iPod is more "software" than "firmware" so I find your video somewhat misleading.
You also only ever use iPodPatcher once (except on the rare occasion that there's a new bootloader version), so if you want to "upgrade your Firmware" you don't need to use it, despite your suggestion that it's what actually "installs the firmware."