Multiple Cisco Phone Firmware

I have new Cisco 7821 phones, and I followed the video below for phone provisioning:

The problem is that there are multiple phone firmware files available. After downloading the zip file from the Cisco site and extracting it (cmterm-78xx.10.2-1-12.zip), I’m unsure which file I need to upload to the VitalPBX phone firmware page.
Any help please

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