ArgumentNullException when calling vid.GetBytes()

[gasand]

Hi,
I'm trying to download videos but I keep receiving the following error:

Code sample:

var youTube = YouTube.Default;
var vid = youTube.GetVideo(VideoURL);
string videoFilePath = source + youtubeID + vid.FileExtension;
File.WriteAllBytes(videoFilePath, vid.GetBytes());

Tested with multiple video URLs, always the same result.
Could you please check if GetBytes() is broken or if there’s an update required for YouTube’s latest changes?

[MNutshell]

I am having the same issue as gasand -

[mfkl]

Same here

>	[Exception] System.Private.CoreLib.dll!System.ThrowHelper.ThrowArgumentNullException(System.ExceptionArgument argument) Line 298	C#
 	[Exception] System.Private.CoreLib.dll!string.Join(string separator, string[] value) Line 676	C#
 	[Exception] libvideo.dll!VideoLibrary.YouTubeVideo.DecryptSignature(string js, string signature) Line 604	C#
 	[Exception] libvideo.dll!VideoLibrary.YouTubeVideo.DecryptAsync(string uri, System.Func<VideoLibrary.DelegatingClient> makeClient) Line 595	C#
 	[Exception] libvideo.dll!VideoLibrary.YouTubeVideo.GetUriAsync(System.Func<VideoLibrary.DelegatingClient> makeClient) Line 559	C#

with

string youtubeUrl = "https://www.youtube.com/watch?v=dQw4w9WgXcQ";
var youtube = YouTube.Default;
var video = youtube.GetVideo(youtubeUrl);
var uri = await video.GetUriAsync();

[danieltornado]

I have the same issue with multiple video URLs (version 3.2.9)

[taivasverkko]

Investigated this a little bit. It seems like GetDecryptionFunctionLines returns null and bad things happen after that. My guess is that YouTube has changed something and the regex in the function does not work anymore.

https://github.com/omansak/libvideo/blob/master/src/libvideo/YouTubeVideo.Decrypt.cs

        private string[] GetDecryptionFunctionLines(string js)
        {
            var decipherFuncName = Regex.Match(js, @"(\w+)=function\(\w+\){(\w+)=\2\.split\(\x22{2}\);.*?return\s+\2\.join\(\x22{2}\)}");
            return decipherFuncName.Success ? decipherFuncName.Groups[0].Value.Split(';') : null;
        }

[omansak]

Related:
Tyrrrz/YoutubeExplode#902
yt-dlp/yt-dlp#14404

[seanstardev]

Interesting... I'm hitting a 403 running the example app. Related?