[Youtube] Inferior quality is downloaded in some cases

[ghost]

Checklist

• I'm reporting a broken site support issue
• I've verified that I'm running youtube-dl version 2020.05.08
• 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

C:\Youtube-dl>youtube-dl -v https://www.youtube.com/watch?v=RVNz9wi9wTY
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', 'https://www.youtube.com/watch?v=RVNz9wi9wTY']
[debug] Encodings: locale cp65001, fs utf-8, out utf-8, pref cp65001
[debug] youtube-dl version 2020.05.08
[debug] Python version 3.8.1 (CPython) - Windows-10-10.0.18362-SP0
[debug] exe versions: ffmpeg git-2020-01-10-3d894db, ffprobe git-2020-01-10-3d894db
[debug] Proxy map: {}
[youtube] RVNz9wi9wTY: Downloading webpage
[youtube] RVNz9wi9wTY: Downloading MPD manifest
[debug] Default format spec: bestvideo+bestaudio/best
[debug] Invoking downloader on ''
[dashsegments] Total fragments: 30
[download] Destination: [Artcore] 繊月 - Query-RVNz9wi9wTY.f248.webm
[download] 100% of 5.87MiB in 00:16
[debug] Invoking downloader on ''
[dashsegments] Total fragments: 17
[download] Destination: [Artcore] 繊月 - Query-RVNz9wi9wTY.f251.webm
[download] 100% of 2.48MiB in 00:02
[ffmpeg] Merging formats into "[Artcore] 繊月 - Query-RVNz9wi9wTY.webm"
[debug] ffmpeg command line: ffmpeg -y -loglevel "repeat+info" -i "file:[Artcore] 繊月 - Query-RVNz9wi9wTY.f248.webm" -i "file:[Artcore] 繊月 - Query-RVNz9wi9wTY.f251.webm" -c copy -map "0:v:0" -map "1:a:0" "file:[Artcore] 繊月 - Query-RVNz9wi9wTY.temp.webm"
Deleting original file [Artcore] 繊月 - Query-RVNz9wi9wTY.f248.webm (pass -k to keep)
Deleting original file [Artcore] 繊月 - Query-RVNz9wi9wTY.f251.webm (pass -k to keep)

Description

137 (avc1) is significantly better than 248 (vp9) in this video, but 248 was downloaded as the default.
https://www.youtube.com/watch?v=62eli4Glk9M
https://www.youtube.com/watch?v=LFUvxDsH_Nk
https://www.youtube.com/watch?v=Duc32lcAhXA

If you play it on Youtube you will see 137 as the default (much better quality), all newer videos of this channel also seem to have this problem.
https://www.youtube.com/user/MementoJosh/videos

Would be nice if you can take a look at it, the compression artifacts are really bad in vp9.

[dstftw]

248 has higher reported bitrate.

[ghost]

Wow ... as much as I like your program, you really are a brick ...
I bet you didn't even visually compare it to see the difference ...

And "higher reported bitrate" are you kidding me?
137 HAS A HIGHER BITRATE, download and compare it yourself.

458 kBit/s vp9 vs 548 kBits/s H264 (High @4.0)

[dstftw]

I bet you didn't even visually compare it to see the difference ...

This must be done programmatically and without downloading the actual media.

And "higher reported bitrate" are you kidding me?

Again: bitrate is reported as metadata by Youtube. You can't get actual bitrate since you'll have to download all formats in order to collect such data.