I was about to commit in addition:
```c++
// Due to videos with automatically generated captions but being set to `Off` by default aren't retrieved with `--sub-langs '.*orig'`.
// My workaround is to first call YouTube Data API v3 Captions: list endpoint with `part=snippet` and retrieve the language that has `"trackKind": "asr"` (automatic speech recognition) in `snippet`.
/*json data = getJson(threadId, "captions?part=snippet&videoId=" + videoId, true, channelToTreat),
items = data["items"];
for(const auto& item : items)
{
json snippet = item["snippet"];
if(snippet["trackKind"] == "asr")
{
string language = snippet["language"];
cmd = cmdCommonPrefix + "--write-auto-subs --sub-langs '" + language + "-orig' --sub-format ttml --convert-subs vtt" + cmdCommonPostfix;
exec(threadId, cmd);
// As there should be a single automatic speech recognized track, there is no need to go through all tracks.
break;
}
}*/
```
Instead of:
```c++
cmd = cmdCommonPrefix + "--write-auto-subs --sub-langs '.*orig' --sub-format ttml --convert-subs vtt" + cmdCommonPostfix;
exec(threadId, cmd);
```
But I realized that, as the GitHub comment I was about to add to https://github.com/yt-dlp/yt-dlp/issues/2655, I was
wrong:
> `yt-dlp --cookies cookies.txt --sub-langs 'en.*,.*orig' --write-auto-subs https://www.youtube.com/watch?v=tQqDBySHYlc` work as expected. Many thanks again.
>
> ```
> 'subtitleslangs': ['en.*','.*orig'],
> 'writeautomaticsub': True,
> ```
>
> Work as expected too. Thank you
>
> Very sorry for the video sample. I even not watched it.
Thank you for this workaround. However note that videos having automatically generated subtitles but being set to `Off` by default aren't retrieved with your method (example of such video: [`mozyXsZJnQ4`](https://www.youtube.com/watch?v=mozyXsZJnQ4)). My workaround is to first call [YouTube Data API v3](https://developers.google.com/youtube/v3) [Captions: list](https://developers.google.com/youtube/v3/docs/captions/list) endpoint with [`part=snippet`](https://developers.google.com/youtube/v3/docs/captions/list#part) and retrieve the [`language`](https://developers.google.com/youtube/v3/docs/captions#snippet.language) that has [`"trackKind": "asr"`](https://developers.google.com/youtube/v3/docs/captions#snippet.trackKind) (automatic speech recognition) in [`snippet`](https://developers.google.com/youtube/v3/docs/captions#snippet).
Also modified compression command, as I got `sh: 1: zip: Argument list too long` when compressing the 248,868 json files of the French most subscribers channel.
As got:
```
terminate called after throwing an instance of 'nlohmann::detail::parse_error'
terminate called recursively
what(): [json.exception.parse_error.101] parse error at line 1, column 1: syntax error while parsing value - unexpected end of input; expected '[', '{', or a literal
terminate called recursively
```
Tested with `UCWIdqSQekeGmUWlSFeCiEnA` which treated correctly the 36 comments of the only comments enabled video `3F8dFt8LsXY`.
Note that this commit doesn't support comments disabled channels with more than 20,000 videos.
