* Fixes `VrtNU` extractor to work with the VRT MAX site change
* Adapts `VRT`, `Ketnet` and `DagelijkseKost` extractors to the new VRT API
* Removes `Canvas` and `CanvasEen` extractors; the sites and API no longer exist
* Moves all remaining VRT-related extractors into the `vrt` module
Closes#4908
Authored by: jeroenj, bergoid, bashonly
Co-authored-by: bergoid <bergoid@users.noreply.github.com>
Co-authored-by: bashonly <88596187+bashonly@users.noreply.github.com>
Using https://github.com/asottile/pyupgrade
1. `__future__` imports and `coding: utf-8` were removed
2. Files were rewritten with `pyupgrade --py36-plus --keep-percent-format`
3. f-strings were cherry-picked from `pyupgrade --py36-plus`
Extractors are left untouched (except removing header) to avoid unnecessary merge conflicts
* All modules and binary names are changed
* All documentation references changed
* yt-dlp no longer loads youtube-dlc config files
* All URLs changed to point to organization account
Co-authored-by: Pccode66
Co-authored-by: pukkandan
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