"CLI Backend download failed" with proxy

[Bolb389]

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Before going further

• If your problem is a bug with youtube-dl or a request for new site support please report it here

• Make sure you are using the latest yt-dlg version (Click the Settings icon and then About to view the current version)

• Make sure you are using the latest youtube-dl version (Click the Settings icon and then Update to update to the latest youtube-dl version)

• Make sure you searched the bugtracker for similar issues including closed ones

• Make sure to read the FAQs file
  link dead, I read this one instead

  • I think my problem is NOT with youtube-dl
  • I've verified and i assure that I'm running yt-dlg 1.8.5
  • I assure that i am using the latest version of youtube-dl see bug bellow
  • Searched bugtracker
  • I've read the FAQs file

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What is the purpose of your issue?

• Bug report
• Feature request (request for a new functionality)
• Question
• Other

Please remove any sections between (---) if they are not related to your issue

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Bug report

If the problem occurs when downloading a URL please provide the full verbose output as follows:

1. Restart yt-dlg
2. Go to Options > Extra tab
3. Enable Debug youtube-dl
4. Go to Options > Advanced tab and Clear your log content
5. Try to download the URL
6. Copy the whole log content and insert it between the ``` part below

2024-01-31 11:19:41,135-DEBUG-Worker_1-Failed to start process: ['C:\\Users\\user\\AppData\\Roaming\\yt-dlg\\yt-dlp.exe', '--newline', '--proxy', 'http://10.202.1.239:8080', '--user-agent', 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:122.0) Gecko/20100101 Firefox/122.', '-i', '-o', 'C:\\Users\\user\\%(title)s.%(ext)s', '-v', '--ignore-config', '--hls-prefer-native', 'https://tube-numerique-educatif.apps.education.fr/w/ux9nBPMugDxBEbm1Y6SjoL']
2024-01-31 11:19:41,135-DEBUG-Worker_1-[WinError 2] Le fichier spécifié est introuvable

What operating system do you use ?

Windows 11 Education 23H2

List of actions to perform to reproduce the problem:

1. .. connect your computer to a network wich need a proxy to access internet
2. .. remove or rename the folder AppData\Roaming\yt-dlg (to simulate a new install)
3. .. Open yt-dlg
4. .. Access Options > Download
5. .. In Network:Proxy, set the proxy, eg. http://10.202.1.239:8080
6. .. Click "Close" to go back to main window
7. .. Add an url to download , and click "Add"
8. .. Click on the Start button

What is the expected behaviour ?

yt-dlg should download the CLI-backend (yt-dlp.exe), then download the video.

What happens instead ?

yt-dlg fail to dowload the CLI-backend (yt-dlp.exe), and then failed to download the video :

The following messages are displayed :
Downloading latest cli backend. Please Wait...
CLI Backend download failed []
Downloaded 0 URL(s) in 0 day(s) 0 minute(s) 0 second(s)
(popup) "Downloads completed"

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What operating system do you use ?

Windows 11 Education 23H2

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When I use youtube-dlg with a proxy, it fail to download the CLI backend, and the video.
But if I put yt-dlp.exe myself in the directory C:\Users\user\AppData\Roaming\yt-dlg\ , it is working fine (even with the proxy), the video is downloaded.

So it seems the problem is only with the download of yt-dlp.exe. Maybe the proxy is only used when downloading a video, not when downloading yt-dlp.exe ? If yes, is it possible to add support of the proxy for the download of yt-dlp.exe ?

Have a nice day :-)