AdvancedSearch adds a few more options to the "Filters" menu when searching on YouTube.
For example, you can filter videos by exact length, by their upload date, by how many views they have. And more.
As of now, AdvancedSearch adds 20 new filters. Take a look at screenshots to see them all and an example use case.
Source code: https://github.com/ftde0/yt-advancedSearch