Hi Python enthusiasts, I'm working on youtube-dl, a handy tool for downloading videos from various websites. There are occasional bug reports with SSL error CERTIFICATE_VERIFY_FAILED when people are trying to download videos from youtube.com [1] or dailymotion.com [2]. The issue about youtube.com turned out to be expired intermediate CA certificates. Some users report that there's one or more expired "Google Internet Authority G2" certificate on their machines. Apparently OpenSSL verifies the whole certificate chain and report an error as soon as it finds an invalid certificate in the chain. My questions is: how to tell from several possible causes to CERTIFICATE_VERIFY_FAILED? Currently both expired self signed certificate leads to CERTIFICATE_VERIFY_FAILED. Thanks for any help or advice.
Best, Yen Chi Hsuan [1] https://github.com/rg3/youtube-dl/issues/7309 [2] https://github.com/rg3/youtube-dl/issues/10574 -- https://mail.python.org/mailman/listinfo/python-list
