Can't download videos anymore while not being signed in (403 Forbidden)

[SPR0UT82]

Version

v1.14.2

Platform

Windows 11 24H2

Steps to reproduce

Video: https://www.youtube.com/watch?v=obmlZH3X9gs&pp=ygUGYW1vZ3Vz
App settings:

Details

Expected behavior: App should display prompt for downloading the video
Actual behavior: App shows this error instead:

Checklist

• I have looked through existing issues to make sure that this bug has not been reported before
• I have provided a descriptive title for this issue
• I have made sure that this bug is reproducible on the latest version of the application
• I have provided all the information needed to reproduce this bug as efficiently as possible
• I have sponsored this project
• I have not read any of the above and just checked all the boxes to submit the issue

[UsaNekoNetizen]

I'm having the exact same issue

[Tyrrrz]

Is it just happening on that one video?

[swsury]

Same error for me. Same error for other videos.

[igorsd]

Same error for me on all videos.

[MarinoLinic]

I can't use the software either on any video. Might be an issue with YouTube Explode.

[jochenschaffer]

I had the same problem with other songs. Not working.
BUT
I've downloaded the whole solution by building in the Debug-Mode there was a fail in the Property
'YoutubeDownloader.ViewModels.Dialogs.AvailableVideoQualityPreferences' in the file
'YoutubeDownloader-master\YoutubeDownloader\ViewModels\Dialogs\DownloadMultipleSetupViewModel.cs':

I've solved as followed, not to know is it the best:

Finally the build was succesful and the downlad was also working with the version 999.9.9

I hope it helps?

Fail-Version was 1.14.2

UUPS: I've also Nuget updated. (sorry almost forgotten)

[solasnut]

@jochenschaffer

ah, I'm not a person who can understand coding or anything. Could u help edit the coding or js make ur explanation simpler please

[jochenschaffer]

@jochenschaffer

ah, I'm not a person who can understand coding or anything. Could u help edit the coding or js make ur explanation simpler please

Hi @solasnut ,
its possible to download the raw code-structure and use it to build a running process.
To build you can use some IntegratedDevelopementEnvironments (f.e. VisualSudioCode, VisualStudio2022, VisualStudio2024, also others from other companies as Microsoft) what you prefer and like. Its also possible to build without an IDE, but with "dotnet build"
https://learn.microsoft.com/en-us/dotnet/core/tools/dotnet-build
Even the IDEs also using "dotnet build".

OK, its not easy, even the builded result is a Debug-Version, which can consist some new not tested features. You can realize, than the Version Number is 999.9.9
So, you can try (and probably learn) to build the code or wait till the changed process, with the normal Versionnumber like 1.14.3 or higher, will be released.

I'm not a contributer who is involved in the build-process of the YTDownloader, I'm only wanted to help. 😊

@Tyrrrz :
If this comment is not liked to placed here, please delete it.

Jochen.

[bendarus]

yeah today i tried again and new update 1.14.2
still same error 403 when fetching
i tried using http proxy debugger, fetch success but download error
i tried using vpn, fetch success but download error
i tried both http debugger and vpn, error.
i give up. i just use other downloader and it work fine.

==
OOT :
cookie case: late year, there streaming directly via google drive with multi quality resolution, by fetching get_video_info file you can get metadata info about quality links, just like YT Explode, but if you request get_video_info in server and play it streaming link in visitor, it will result 403. however if you get get_video_info in client side, you can play it streming link. unfortunatelly, to get get_video_info in client side need javascript, and last year they agree to implement cross origin header restiriction in browser, so it not work anymore.
bot case: manga downloader hakuneko will detected as bot and cannot bypass cloudflare captcha. but new application haruneko work fine

but reply from jochenschaffer above seem like bug in the code?? ok hope it fix and will try 1.14.3

[AlexMorgun]

Same problem with all videos. With some videos before loading like SPR0UT82. With some videos loading and closer to the end there is a loading error and 403.
MacOS Ventura 13.7.4. Without VPN and logged into YouTube.

[Tyrrrz]

So the 403 error most likely indicates a change in the signature cipher algorithm by YouTube. I have not been able to reproduce it, so cannot comment on how/when this can be fixed.

Underlying issue: Tyrrrz/YoutubeExplode#853

[happywolf]

I noticed if I quit the app and start it up again. I can download a few videos before it start failing again.

[solasnut]

@jochenschaffer
Ah, well thank u for at least explaining