/channels/latest: author ID fallback in video entry

Exclude m3u8 playlist formats

Change http_dash_fragments detection based on yt-dlp translating adaptive streams to fragments

https://matrix.to/#/!vZmGzbsnHuVTLMItyg:cadence.moe/$VHp8D4XgW5jFbA6MhPaI52hZVMt_wpNy9gCSbF6Ot1Y?via=cadence.moe&via=matrix.org&via=envs.net

Support new channel layout

Channel path fixes I'm pretty sure I already did?

- use "channels" as default path, not "user"
- cache based on the combination of the path and the id
- fix channel latest

#29 Extract named channels using dynamic endpoint with second__path param instead of /user/

#42 Return UNKNOWN error for not explicitly handled errors for channel extraction instead of stacktrace

Explain bind_host in sample configuration

Remove `with requests` when it is unnecessary

Do not actually write out pages.

Report errors when an account has been terminated

Stream responses on /vi and /ggpht endpoints

The chunk_size=None parameter to iter_content lets us consume data as
soon as it arrives
https://docs.python-requests.org/en/master/api/#requests.Response.iter_content

Fix regular captions

This removes all of the code that was previously used to get them from
/timedtext, and instead, always uses whatever is extracted from the
video page.

This does unfortunately now require a whole video fetch just for the
captions. But assuming captions are only requested by a frontend, this
won't be a problem due to the memory cache. The captions link will be
in memory because the just-requested video is in memory too.

Do not extract storyboards into v/a formats

Fix recommended videos extraction on some remaining IDs

Example: https://www.youtube.com/watch?v=-_GDl6cBebQ
https://github.com/yt-dlp/yt-dlp/blob/2e9a445bc34e79182f900909d727ba87f8487522/yt_dlp/extractor/common.py#L816

Amends f22decbb

Extract fact check notices to second__clarification

Fix recommended extraction when fact check notice

Fix recommended videos extraction on IDs starting with - and _

Let's just leverage yt_dlp instead of rolling our own algorithms and fix
this kind of issue (not finding yt_dlp dump file for a given video) once
and for all

Example videos:
* https://www.youtube.com/watch?v=-q78QXpSL2M
* https://www.youtube.com/watch?v=_4SKG5uUEqs

Update link to NewLeaf installation

Fix file detection and recommendations