Repository: yt-dlp
Issue: The "is_live" flag isn't working properly with Facebook Live Streams
Labels: site-bug

### DO NOT REMOVE OR SKIP THE ISSUE TEMPLATE

- [X] I understand that I will be **blocked** if I remove or skip any mandatory\* field

### Checklist

- [X] I'm reporting a bug unrelated to a specific site
- [X] I've verified that I'm running yt-dlp version **2022.09.01** ([update instructions](https://github.com/yt-dlp/yt-dlp#update)) or later (specify commit)
- [X] I've checked that all provided URLs are playable in a browser with the same IP and same login details
- [X] I've checked that all URLs and arguments with special characters are [properly quoted or escaped](https://github.com/yt-dlp/yt-dlp/wiki/FAQ#video-url-contains-an-ampersand--and-im-getting-some-strange-output-1-2839-or-v-is-not-recognized-as-an-internal-or-external-command)
- [X] I've searched the [bugtracker](https://github.com/yt-dlp/yt-dlp/issues?q=) for similar issues **including closed ones**. DO NOT post duplicates
- [X] I've read the [guidelines for opening an issue](https://github.com/yt-dlp/yt-dlp/blob/master/CONTRIBUTING.md#opening-an-issue)

### Provide a description that is worded well enough to be understood

When using the flag: --match-filter "is_live" for Facebook Live Streams the output does not reflet the live status of the stream.

Current behavior: 

![fb-live-stream-is-live-example](https://user-images.githubusercontent.com/58118355/191309600-cd9b0d3a-641e-491c-8b38-8ac58daa2ca6.png)

Another example:

![example-2-not-working](https://user-images.githubusercontent.com/58118355/191309653-6fb9f254-394f-4b97-910f-9ccee3fc59dc.png)

When using a stream from Youtube or Twitch this does not happen.

Examples:

![twitch-example](https://user-images.githubusercontent.com/58118355/191310386-691c2102-e90b-468b-9671-bf055bbe123f.png)

![yt-example](https://user-images.githubusercontent.com/58118355/191310413-1aebc123-5743-4e38-b63f-5a707cfb1e6c.png)


### Provide verbose output that clearly demonstrates the problem

- [X] Run **your** yt-dlp command with **-vU** flag added (`yt-dlp -vU <your command line>`)
- [X] Copy the WHOLE output (starting with `[debug] Command-line config`) and insert it below

### Complete Verbose Output

```shell
[debug] Command-line config: ['https://www.facebook.com/ABCNewsLive/videos/5344999658929396', '--match-filter', 'is_live', '-g', '-vU']
[debug] Encodings: locale cp1252, fs utf-8, pref cp1252, out utf-8, error utf-8, screen utf-8
[debug] yt-dlp version 2022.07.18 [135f05e] (win32_exe)
[debug] Python 3.8.10 (CPython 64bit) - Windows-10-10.0.19042-SP0
[debug] Checking exe version: ffmpeg -bsfs
[debug] Checking exe version: ffprobe -bsfs
[debug] Checking exe version: avprobe -bsfs
[debug] exe versions: ffmpeg 4.3.1
[debug] Optional libraries: Cryptodome-3.15.0, brotli-1.0.9, certifi-2022.06.15, mutagen-1.45.1, sqlite3-2.6.0, websockets-10.3
[debug] Proxy map: {}
[debug] Fetching release info: https://api.github.com/repos/yt-dlp/yt-dlp/releases/latest
Latest version: 2022.09.01, Current version: 2022.07.18
[debug] Downloading _update_spec from https://github.com/yt-dlp/yt-dlp/releases/download/2022.09.01/_update_spec
Current Build Hash a1aaaa4e7131993348fbf28a001feddf5b0335e31ee6e254e6c4bbaabdae1a1e
Updating to version 2022.09.01 ...
[debug] Downloading yt-dlp.exe from https://github.com/yt-dlp/yt-dlp/releases/download/2022.09.01/yt-dlp.exe
[debug] Downloading SHA2-256SUMS from https://github.com/yt-dlp/yt-dlp/releases/download/2022.09.01/SHA2-256SUMS
Updated yt-dlp to version 2022.09.01
[debug] Restarting: "C:\work\5007\stage\x64\Debug\bin\yt-dlp\yt-dlp.exe" "https://www.facebook.com/ABCNewsLive/videos/5344999658929396" --match-filter is_live -g -vU
[debug] Command-line config: ['https://www.facebook.com/ABCNewsLive/videos/5344999658929396', '--match-filter', 'is_live', '-g', '-vU']
[debug] Encodings: locale cp1252, fs utf-8, pref cp1252, out utf-8, error utf-8, screen utf-8
[debug] yt-dlp version 2022.09.01 [5d7c7d6] (win32_exe)
[debug] Python 3.8.10 (CPython 64bit) - Windows-10-10.0.19042-SP0
[debug] Checking exe version: ffmpeg -bsfs
[debug] Checking exe version: ffprobe -bsfs
[debug] exe versions: ffmpeg 4.3.1
[debug] Optional libraries: Cryptodome-3.15.0, brotli-1.0.9, certifi-2022.06.15, mutagen-1.45.1, sqlite3-2.6.0, websockets-10.3
[debug] Proxy map: {}
[debug] Loaded 1670 extractors
[debug] Fetching release info: https://api.github.com/repos/yt-dlp/yt-dlp/releases/latest
Latest version: 2022.09.01, Current version: 2022.09.01
yt-dlp is up to date (2022.09.01)
[debug] [facebook] Extracting URL: https://www.facebook.com/ABCNewsLive/videos/5344999658929396
[facebook] 5344999658929396: Downloading webpage
[facebook] 5344999658929396: Downloading MPD manifest
[facebook] 5344999658929396: Downloading MPD manifest
[facebook] 5344999658929396: Downloading MPD manifest
[debug] Sort order given by extractor: res, quality
[debug] Formats sorted by: hasvid, ie_pref, res, quality, lang, fps, hdr:12(7), vcodec:vp9.2(10), channels, acodec, filesize, fs_approx, tbr, vbr, abr, asr, proto, vext, aext, hasaud, source, id
[download] Hurricane Fiona updates: Category 3 storm moves north after wreaking havoc in Puerto Rico does not pass filter (is_live), skipping ..
```