libvideo (aka VideoLibrary) is a modern .NET library for downloading YouTube videos. It is portable to most platforms and is very lightweight.

You can grab a copy of the library on NuGet by running:

Install-Package VideoLibrary

Alternatively, you can try building the repo if you like your assemblies extra-fresh.

• .NET Core Web/Console/ClassLibrary
• .NET Framework 4.5+
• Windows 10 Universal apps
• Portable Class Libraries
• Xamarin.iOS
• Xamarin.Android
• Mono (Mac/Linux)
• Windows 8.1 and 8.0
• Windows Phone 8.1

Here's a small sample to help you get familiar with libvideo:

using VideoLibrary;

void SaveVideoToDisk(string link)
{
    var youTube = YouTube.Default; // starting point for YouTube actions
    var video = youTube.GetVideo(link); // gets a Video object with info about the video
    File.WriteAllBytes(@"C:\" + video.FullName, video.GetBytes());
}

Or, if you use Visual Basic:

Imports VideoLibrary

Sub SaveVideoToDisk(ByVal link As String)
     Dim video = YouTube.Default.GetVideo(link)
     File.WriteAllBytes("C:\" & video.FullName, video.GetBytes())
End Sub

If you'd like to check out some more of our features, take a look at our docs. You can also refer to our example application (named Valks, yes, I know, it's a silly name) if you're looking for a more comprehensive sample.

libvideo is licensed under the BSD 2-clause license.