using System;

using YoutubeExplode;

using YoutubeExplode.Videos;

​

VideoId id = "https://m.youtube.com/watch?v=BTa2P8Z-O0w";

​

YoutubeClient client = new();

var video = await client.Videos.GetAsync(id);

Console.WriteLine(video.Duration.Value == default);

​

var stream = await client.Videos.GetAsync("https://youtu.be/5qap5aO4i9A");

Console.WriteLine(stream.Duration.Value == default);