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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
You can download the latest version of youtube-dl easily from it's site (note the hyperlink "Windows exe") or from it's github releases (note "youtube-dl.exe" under Assets for any particular release). Other installation methods can be found here.
If it's something you really care about, take a step further and back up the video yourself! Use any flavor of youtube-dl (here's one with a simple to use GUI) to save the video to your computer, and consider reuploading it yourself after it gets taken down.
To get the best quality, you have to use ffmpeg in tandem with youtube-dl to merge the seperate audio and video files together. youtube-dl will handle this for you automatically if you specify it's location with --ffmpeg-location