youtube-dl: Youtube-dl doesn't seem to be able to download certain videos from youtube.com anymore

• [x ] I’ve verified and I assure that I’m running youtube-dl 2018.01.21
• [x ] At least skimmed through the README, most notably the FAQ and BUGS sections
• [x ] Searched the bugtracker for similar issues including closed ones
• [x ] Bug report (encountered problems with youtube-dl)

C:\Users\Computer User\Downloads>youtube-dl -v https://www.youtube.com/watch?v=E
uFfmnu34rs
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', 'https://www.youtube.com/watch?v=EuFfmnu34rs']

[debug] Encodings: locale cp1252, fs mbcs, out cp437, pref cp1252
[debug] youtube-dl version 2018.01.21
[debug] Python version 3.4.4 (CPython) - Windows-7-6.1.7601-SP1
[debug] exe versions: avconv 11.3, avprobe 11.3, ffmpeg N-83657-g7e4f32f, ffprob
e N-83657-g7e4f32f
[debug] Proxy map: {}
[youtube] EuFfmnu34rs: Downloading webpage
[youtube] EuFfmnu34rs: Downloading video info webpage
ERROR: EuFfmnu34rs: YouTube said: Invalid parameters.
Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpm93u0ksi\bu
ild\youtube_dl\YoutubeDL.py", line 784, in extract_info
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpm93u0ksi\bu
ild\youtube_dl\extractor\common.py", line 438, in extract
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpm93u0ksi\bu
ild\youtube_dl\extractor\youtube.py", line 1609, in _real_extract
youtube_dl.utils.ExtractorError: EuFfmnu34rs: YouTube said: Invalid parameters.
...
<end of log>

Hi. Youtube-dl is an excellent program, it can usually download videos from youtube and other sites quickly and easily in many different formats, and has lots of customization options, however lately it seems that it isn’t downloading certain videos from youtube like this one “https://www.youtube.com/watch?v=EuFfmnu34rs”, for example.

Also, something that may be useful for troubleshooting and related to this issue with youtube-dl, having to do with a change on youtube’s website, not with youtube-dl itself, is that it seems that certain online youtube video downloader websites like these ones “get-video.online”, “getvidnow.com”, yoodownload.com" also aren’t able to download the link to the youtube video above, even though they used to be able to, while these ones “clipconverter.cc”, “convert2mp3.net/en”, “youtubemultidownloader.com” are. So maybe youtube has changed something on their website that’s making youtube-dl unable to download certain videos? It used to be that you could just type “youtube-dl <video URL>” and the video would download fine, but now it doesn’t for certain videos, however this video “https://www.youtube.com/watch?v=Zi_XLOBDo_Y” still downloads fine with youtube-dl.

I’d really appreciate some more information on this, and to know if anyone else is experiencing this, as well as to know if there’s anything that can be done to fix it. If you need any other information, please let me know. Thanks. Have a good day.