Not format check on resume

[suuuehgi]

Checklist

• I'm reporting a broken site support issue
• I've verified that I'm running youtube-dl version 2020.09.14
• I've checked that all provided URLs are alive and playable in a browser
• I've checked that all URLs and arguments with special characters are properly quoted or escaped
• I've searched the bugtracker for similar bug reports including closed ones
• I've read bugs section in FAQ

Verbose log

> youtube-dl -v -f 571 QPdWJeybMo8
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', '-f', '571', 'QPdWJeybMo8']
[debug] Encodings: locale UTF-8, fs utf-8, out utf-8, pref UTF-8
[debug] youtube-dl version 2020.09.14
[debug] Python version 3.8.5 (CPython) - Linux-5.8.6-arch1-1-x86_64-with-glibc2.2.5
[debug] exe versions: ffmpeg 4.3.1, ffprobe 4.3.1, phantomjs 2.1.1, rtmpdump 2.4
[debug] Proxy map: {}
[youtube] QPdWJeybMo8: Downloading webpage
[debug] Invoking downloader on 'https://r5---sn-4g5e6nes.googlevideo.com/videoplayback?expire=1600540356&ei=ZPplX6OdDsiF6dsP_dmBiAE&ip=2a02%3A8108%3A96c0%3A57a4%3Ab55b%3A7034%3Abaa1%3Ace64&id=o-AB_FvefDLP0BLNf7AJrUvm_AMCNpJEx7b-RsAfU3beyU&itag=571&aitags=133%2C134%2C135%2C136%2C137%2C160%2C242%2C243%2C244%2C247%2C248%2C271%2C278%2C313%2C394%2C395%2C396%2C397%2C398%2C399%2C400%2C401%2C402%2C571&source=youtube&requiressl=yes&mh=Na&mm=31%2C26&mn=sn-4g5e6nes%2Csn-i5heen7z&ms=au%2Conr&mv=m&mvi=5&pl=41&initcwndbps=2208750&vprv=1&mime=video%2Fmp4&gir=yes&clen=610632125&dur=213.179&lmt=1578459218333428&mt=1600518630&fvip=5&keepalive=yes&fexp=23915654&c=WEB&txp=5531432&sparams=expire%2Cei%2Cip%2Cid%2Caitags%2Csource%2Crequiressl%2Cvprv%2Cmime%2Cgir%2Cclen%2Cdur%2Clmt&sig=AOq0QJ8wRAIgXyNaR03oPAGMS3MizYm3BllW5gNNwRMYPj7UXlNdzEUCIFAyqtd5NNRxNnObGOOgrqwz4_SyMslxnxVhIqHEKjM6&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps&lsig=AG3C_xAwRgIhAJpLkDI95zRKP_B59ctExMUcOGxWKnIeV4CKLnlunJMjAiEA-5BbjdwaETc5ypLpI6BdDN-2ugxDt88jnnUb8tsF8Gk%3D&ratebypass=yes'
[download] Destination: NORWAY 8K-QPdWJeybMo8.mp4
[download]   0.7% of 582.34MiB at  9.05MiB/s ETA 01:03^C
ERROR: Interrupted by user

[1]> youtube-dl -v -f 402 QPdWJeybMo8
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', '-f', '402', 'QPdWJeybMo8']
[debug] Encodings: locale UTF-8, fs utf-8, out utf-8, pref UTF-8
[debug] youtube-dl version 2020.09.14
[debug] Python version 3.8.5 (CPython) - Linux-5.8.6-arch1-1-x86_64-with-glibc2.2.5
[debug] exe versions: ffmpeg 4.3.1, ffprobe 4.3.1, phantomjs 2.1.1, rtmpdump 2.4
[debug] Proxy map: {}
[youtube] QPdWJeybMo8: Downloading webpage
[debug] Invoking downloader on 'https://r5---sn-4g5e6nes.googlevideo.com/videoplayback?expire=1600540369&ei=cfplX7SJNb-Ex_AP6bCMmA8&ip=2a02%3A8108%3A96c0%3A57a4%3Ab55b%3A7034%3Abaa1%3Ace64&id=o-ANTDOm6rYmb8QM4GVBSzwJHRpaicK_n1pBu6aKFpECtc&itag=402&aitags=133%2C134%2C135%2C136%2C137%2C160%2C242%2C243%2C244%2C247%2C248%2C271%2C278%2C313%2C394%2C395%2C396%2C397%2C398%2C399%2C400%2C401%2C402%2C571&source=youtube&requiressl=yes&mh=Na&mm=31%2C26&mn=sn-4g5e6nes%2Csn-i5heen7z&ms=au%2Conr&mv=m&mvi=5&pl=41&initcwndbps=2145000&vprv=1&mime=video%2Fmp4&gir=yes&clen=385421990&dur=213.179&lmt=1578459782014809&mt=1600518630&fvip=5&keepalive=yes&beids=9466587&c=WEB&txp=5531432&sparams=expire%2Cei%2Cip%2Cid%2Caitags%2Csource%2Crequiressl%2Cvprv%2Cmime%2Cgir%2Cclen%2Cdur%2Clmt&sig=AOq0QJ8wRQIhAIzKQ_imkA1Xdk9PaTxtiJwO1PfaeHm0rNYln857zd-yAiAn8A2RmQn4UyJJf6hZ6UojKNrNOV22JbynfNKv6QTdXw%3D%3D&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps&lsig=AG3C_xAwRAIgEFAqXqs6miTQe5DEd7ondumvfLa2rnTaCSsZRqVsLToCID1-V416H1dPfemZOJ8jlkTmXQlmPKpYxSZiB_Yq1eM0&ratebypass=yes'
--> [download] Resuming download at byte 4193280
[download] Destination: NORWAY 8K-QPdWJeybMo8.mp4
[download]   4.2% of 367.57MiB at  6.84MiB/s ETA 00:51^C
ERROR: Interrupted by user

Description

On resume, youtube-dl does not check whether the format parameter matches but just appends. This may lead to broken files.

[dstftw]

This is expected behavior for now.