[coub] Best format improperly detected

[SebiderSushi]

Checklist

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl version 2020.05.29
• 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 issues including closed ones

Verbose log

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', '-F', 'https://coub.com/view/1ovvj6']
[debug] Encodings: locale UTF-8, fs utf-8, out utf-8, pref UTF-8
[debug] youtube-dl version 2020.05.29
[debug] Python version 3.8.3 (CPython) - Linux-5.4.43-1-MANJARO-x86_64-with-glibc2.2.5
[debug] exe versions: ffmpeg 4.2.3, ffprobe 4.2.3, rtmpdump 2.4
[debug] Proxy map: {}
[Coub] 1ovvj6: Downloading JSON metadata
[info] Available formats for 1ovvj6:
format code         extension  resolution note
html5-audio-med     mp3        audio only 992.11KiB
html5-audio-high    mp3        audio only 1.32MiB
html5-video-higher  mp4        unknown    1.95MiB
html5-video-med     mp4        unknown    572.39KiB
html5-video-high    mp4        unknown    1.37MiB (best)

Description

On coub.com, videos might be served in a higher resolution, titled html5-video-higher.
Contrary to the expected, youtube-dl does not recognize this fromat as (best).