Could you link to the one you're talking about? I'd like to check it out.
https://www.amazon.com/Seek-Thermal-Compact-All-Purpose-Micr...
Non-starter for me.
FYI. You can just buy FLIR thermal sensors directly and throw them onto a board then use that as a webcam. There's a whole company dedicated to that: https://groupgets.com/manufacturers/getlab
This is awesome. Being able to mix and match the parts/boards to get what you want and all with a standard webcam output.
Brilliant.
The EEVBlog Thermal Forum is a great place to learn more. There are some deep wizards over there, some great comparison threads, etc.