peertube: the videos work with "watch" urls but fail with "embed"

[juanfra684]

Checklist

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl version 2019.07.02
• 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

$ youtube-dl -v -g 'https://peertube.social/videos/embed/77c0ec43-5b1a-4f28-91e4-b436b4129f66'
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', '-g', 'https://peertube.social/videos/embed/77c0ec43-5b1a-4f28-91e4-b436b4129f66']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2019.07.02
[debug] Python version 3.7.3 (CPython) - Linux
[debug] exe versions: ffmpeg 4.1.3, ffprobe 4.1.3, rtmpdump 2.4
[debug] Proxy map: {}
WARNING: Falling back on generic information extractor.
ERROR: Unsupported URL: https://peertube.social/videos/embed/77c0ec43-5b1a-4f28-91e4-b436b4129f66
Traceback (most recent call last):
  File "/usr/lib/python3.7/site-packages/youtube_dl/YoutubeDL.py", line 796, in extract_info
    ie_result = ie.extract(url)
  File "/usr/lib/python3.7/site-packages/youtube_dl/extractor/common.py", line 530, in extract
    ie_result = self._real_extract(url)
  File "/usr/lib/python3.7/site-packages/youtube_dl/extractor/generic.py", line 3333, in _real_extract
    raise UnsupportedError(url)
youtube_dl.utils.UnsupportedError: Unsupported URL: https://peertube.social/videos/embed/77c0ec43-5b1a-4f28-91e4-b436b4129f66
$ youtube-dl -v -g 'https://peertube.social/videos/watch/77c0ec43-5b1a-4f28-91e4-b436b4129f66'
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', '-g', 'https://peertube.social/videos/watch/77c0ec43-5b1a-4f28-91e4-b436b4129f66']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2019.07.02
[debug] Python version 3.7.3 (CPython) - Linux
[debug] exe versions: ffmpeg 4.1.3, ffprobe 4.1.3, rtmpdump 2.4
[debug] Proxy map: {}
WARNING: Falling back on generic information extractor.
[debug] Default format spec: bestvideo+bestaudio/best
https://peertube.social/static/webseed/77c0ec43-5b1a-4f28-91e4-b436b4129f66-544.mp4

Description

The peertube urls with the form "instance.domain/videos/watch/id" work but the same urls fail when using the form "instance.domain/videos/embed/id". Could you add support for the "embed" urls?.