It does a lot under the hood to get as close as possible to the actual value.
If you want to see exactly what it’s doing, the code is open source & the maintainer is active in the community.
It’s actually really popular, even outside of the privacy/tech space. It just happens to be the most popular in this area making it more likely to be accurate to the actual value.
It’s less accurate on small videos though, as there’s not as much data to to pull from.
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