youtube-dl-gui: does not download the selected Format anymore (480p)

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Before going further

• [x ] I think my problem is NOT with youtube-dl
• [x ] I’ve verified and i assure that I’m running yt-dlg 1.8.3
• [x ] I assure that i am using the latest version of youtube-dl
• [ x] Searched bugtracker
• [x ] I’ve read the FAQs file

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What is the purpose of your issue?

• [ x] 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. Copy the whole log content and insert it between the ``` part below

2022-02-17 12:27:11,915-DEBUG-Worker_1-[debug] System config: []
2022-02-17 12:27:11,915-DEBUG-Worker_1-[debug] User config: []
2022-02-17 12:27:11,915-DEBUG-Worker_1-[debug] Custom config: []
2022-02-17 12:27:11,915-DEBUG-Worker_1-[debug] Command-line args: ['--newline', '-i', '-o', 'X:\\xxx\\%(title)s.%(ext)s', '-v', '--ignore-config', '--hls-prefer-native', '--no-check-certificate', 'https://www.youtube.com/watch?v=randomvideo']
2022-02-17 12:27:11,915-DEBUG-Worker_1-[debug] Encodings: locale cp1252, fs mbcs, out cp1252, pref cp1252
2022-02-17 12:27:11,915-DEBUG-Worker_1-[debug] youtube-dl version 2021.12.17
2022-02-17 12:27:11,915-DEBUG-Worker_1-[debug] Python version 3.4.4 (CPython) - Windows-7-6.1.7601-SP1
2022-02-17 12:27:11,915-DEBUG-Worker_1-[debug] exe versions: none
2022-02-17 12:27:11,915-DEBUG-Worker_1-[debug] Proxy map: {}
2022-02-17 12:27:11,915-DEBUG-Worker_1-[debug] Default format spec: best/bestvideo+bestaudio

What operating system do you use ?

win7 and win10, both 64bits

List of actions to perform to reproduce the problem:

1. tick only the 480p dash video option in the Formats options (because there is no regular 480p option)
2. copy-paste yt url
3. press dl
4. wait until 100%

What is the expected behaviour ?

it should download a 480p video

What happens instead ?

downloads either 360p or 720p video

i selected the 480p video option, but it just downloads a random format instead… it did work correctly like 2-3 months ago…