upstream bugtracker says
- [ ] I've verified that I'm running youtube-dl version **2019.06.08**

[harry@srv-rhsoft:/downloads]$ youtube-dl --verbose https://www.youtube.com/watch?v=iq7myH0rR5g
[debug] System config: ['--prefer-free-formats']
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--verbose', 'https://www.youtube.com/watch?v=iq7myH0rR5g']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2019.04.24
[debug] Python version 3.7.3 (CPython) - Linux-5.1.9-200.fc29.x86_64-x86_64-with-fedora-29-Generic
[debug] exe versions: ffmpeg 4.1.3
[debug] Proxy map: {}
[youtube] iq7myH0rR5g: Downloading webpage
[youtube] iq7myH0rR5g: Downloading video info webpage
[youtube] {18} signature length 105, html5 player vflzbi_R5
[youtube] {137} signature length 105, html5 player vflzbi_R5
[youtube] {248} signature length 101, html5 player vflzbi_R5
[youtube] {136} signature length 105, html5 player vflzbi_R5
[youtube] {247} signature length 105, html5 player vflzbi_R5
[youtube] {135} signature length 105, html5 player vflzbi_R5
[youtube] {244} signature length 101, html5 player vflzbi_R5
[youtube] {134} signature length 105, html5 player vflzbi_R5
[youtube] {243} signature length 105, html5 player vflzbi_R5
[youtube] {133} signature length 101, html5 player vflzbi_R5
[youtube] {242} signature length 105, html5 player vflzbi_R5
[youtube] {160} signature length 105, html5 player vflzbi_R5
[youtube] {278} signature length 105, html5 player vflzbi_R5
[youtube] {140} signature length 105, html5 player vflzbi_R5
[youtube] {171} signature length 105, html5 player vflzbi_R5
[youtube] {249} signature length 105, html5 player vflzbi_R5
[youtube] {250} signature length 101, html5 player vflzbi_R5
[youtube] {251} signature length 105, html5 player vflzbi_R5
WARNING: unable to extract channel id; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
[debug] Default format spec: bestvideo+bestaudio/best
[debug] Invoking downloader on 'https://r5---sn-h0jeen7d.googlevideo.com/videoplayback?expire=1560674455&ei=NqwFXem0OsidgQfqw5ngBg&ip=62.178.103.85&id=o-AATJ98g7X8QHJbEBVZmXXXF7y3EJ0ThKrLZF3rCgPZ7d&itag=248&aitags=133%2C134%2C135%2C136%2C137%2C160%2C242%2C243%2C244%2C247%2C248%2C278&source=youtube&requiressl=yes&mm=31%2C26&mn=sn-h0jeen7d%2Csn-4g5ednz7&ms=au%2Conr&mv=m&pl=17&initcwndbps=1186250&mime=video%2Fwebm&gir=yes&clen=7355496&dur=227.268&lmt=1560458255362446&mt=1560652708&fvip=5&keepalive=yes&c=WEB&txp=5432432&sparams=expire%2Cei%2Cip%2Cid%2Caitags%2Csource%2Crequiressl%2Cmime%2Cgir%2Cclen%2Cdur%2Clmt&lsparams=mm%2Cmn%2Cms%2Cmv%2Cpl%2Cinitcwndbps&lsig=AHylml4wRQIhAIET-3QzRVdBH0ulkw5YPfK8glEP2RevXRuQOz5xMVSyAiASqyGeCh3K_ZhZ75du303MrpWjq-6hnCDPfxaPTrwZcw%3D%3D&signature=ALgxI2wwRAIgdaQ6OjsDbNnHJZAIY7zmAY6el_vdyDseB-RmtHL5nrkCIHqBjHwJVf6wbQWvkgafROlb6arz45Jm1-syE_O_ipmd&ratebypass=yes'
ERROR: unable to download video data: HTTP Error 403: Forbidden
Traceback (most recent call last):
  File "/usr/lib/python3.7/site-packages/youtube_dl/YoutubeDL.py", line 1908, in process_info
    partial_success = dl(fname, new_info)
  File "/usr/lib/python3.7/site-packages/youtube_dl/YoutubeDL.py", line 1853, in dl
    return fd.download(name, info)
  File "/usr/lib/python3.7/site-packages/youtube_dl/downloader/common.py", line 364, in download
    return self.real_download(filename, info_dict)
  File "/usr/lib/python3.7/site-packages/youtube_dl/downloader/http.py", line 341, in real_download
    establish_connection()
  File "/usr/lib/python3.7/site-packages/youtube_dl/downloader/http.py", line 109, in establish_connection
    ctx.data = self.ydl.urlopen(request)
  File "/usr/lib/python3.7/site-packages/youtube_dl/YoutubeDL.py", line 2226, in urlopen
    return self._opener.open(req, timeout=self._socket_timeout)
  File "/usr/lib64/python3.7/urllib/request.py", line 531, in open
    response = meth(req, response)
  File "/usr/lib64/python3.7/urllib/request.py", line 641, in http_response
    'http', request, response, code, msg, hdrs)
  File "/usr/lib64/python3.7/urllib/request.py", line 569, in error
    return self._call_chain(*args)
  File "/usr/lib64/python3.7/urllib/request.py", line 503, in _call_chain
    result = func(*args)
  File "/usr/lib64/python3.7/urllib/request.py", line 649, in http_error_default
    raise HTTPError(req.full_url, code, msg, hdrs, fp)
urllib.error.HTTPError: HTTP Error 403: Forbidden