Show HN: Download thumbnail frames from a video's progress bar

So I made this little python library to download those thumbnail sized preview frames that are shown when you hover the cursor over a YouTube video player's progress bar.

This can be useful for many things, but the idea is that there's a lot of computer vision problems that require processing a massive amount of internet videos. In these cases, the bottleneck is usually not the algorithm itself but instead it's retrieving the videos in the first place. In those cases, downloading these thumbnail frames may help you solve these problems.