We'll start from a cosuming side (download) rather than a producing site (uploading).
Though there are numerous ways of downloading the video, we'll use youtube-dl:
$ youtube-dl https://www.youtube.com/watch?v=N6-2fVsFV8E
If we do not want to delete the original before youtube-dl merges, we can use k option:
$ youtube-dl -k https://www.youtube.com/watch?v=N6-2fVsFV8E
Check what files are there:
$ ls Yosemite HD-N6-2fVsFV8E.f171.webm Yosemite HD-N6-2fVsFV8E.f264.mp4 Yosemite HD-N6-2fVsFV8E.mkv
We may want to rename it to a simple one such as YosemiteHDI.mp4 for later use.
Here is the downloaded video:
We can do more than just download a video.
Please visit YouTube extract-iframe page
Click the app icons listed below to see what PyGoogle can does.