[France.tv] A capture get 8 sec of sound only instead of 1h33m because the sound was gapped on the original

[Rpnpif]

youtube-dl -v https://www.france.tv/documentaires/science-sante/1452709-le-genie-des-arbres.html
got a video with 8 sec of sound only instead of 1h32m.
The image was fine.

Checklist

• I'm reporting a broken site support
• 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 issues including closed ones

Verbose log

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-v', u'https://www.france.tv/documentaires/science-sante/1452709-le-genie-des-arbres.html']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2020.05.08
[debug] Python version 2.7.16 (CPython) - Linux-5.5.0-0.bpo.2-amd64-x86_64-with-debian-10.4
[debug] exe versions: ffmpeg 4.1.4-1, ffprobe 4.1.4-1
[debug] Proxy map: {}
[FranceTVSite] 1452709-le-genie-des-arbres: Downloading webpage
[FranceTV] 20fc5c66-58a2-456f-867d-741a4bc11849: Downloading video JSON
[FranceTV] 20fc5c66-58a2-456f-867d-741a4bc11849: Downloading geo restriction info
[FranceTV] 20fc5c66-58a2-456f-867d-741a4bc11849: Downloading signed hls_v5_os manifest URL
[FranceTV] 20fc5c66-58a2-456f-867d-741a4bc11849: Downloading m3u8 information
[FranceTV] 20fc5c66-58a2-456f-867d-741a4bc11849: Downloading signed m3u8-download manifest URL
[FranceTV] 20fc5c66-58a2-456f-867d-741a4bc11849: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[debug] Invoking downloader on u'https://cloudreplayfrancetv.akamaized.net/51ee042badbe5/228737167_france-domtom_TA.ism/ZXhwPTE1OTAwMjA4NDR+YWNsPSUyZjUxZWUwNDJiYWRiZTUlMmYyMjg3MzcxNjdfZnJhbmNlLWRvbXRvbV9UQS5pc20qfmhtYWM9ZmZlMmI2NTU1NDI5NjQzOTYwMGY2MzUyMTllODRhZDMyYjU0MTEzOWQzZTk5ODEzYzJjZTc5MTYxOGEzNDYyOA==/228737167_france-domtom_TA-video=2000000.m3u8'
[hlsnative] Downloading m3u8 manifest
[hlsnative] Total fragments: 696
[download] Destination: Le génie des arbres-20fc5c66-58a2-456f-867d-741a4bc11849.fhls_v5_os-2186.mp4
[download]   0.8% of ~1.34GiB at 520.78KiB/s ETA 48:38

Description

The downloaded film was with 8 sec of sound instead of 1h32m.
I download the original sound without the video. I get the entire sound but after the first 8 sec, a gap is put of some seconds. This sound gap crashes ffmpeg. So no other sound was decoded.
The audio has a lot of these gaps.
mpv says :
[lavf] error reading packet
then after some errors, it stopped.

Vlc stopped on the 1st gap without errors.

Firefox read fine this online video with all the audio despite the gaps.