Commenting on Youtube requires 3rd-party cookies, which is a security flaw,
because it leaks data about your web browsing to those 3rd-party web sites.
The following is a message from an apparent Google tech-support guy:
"Yes, I agree that it should be fixed, but it's not going to be a quick or
easy fix. I suspect that when the new system was developed, nobody stopped to
consider whether third-party cookie filtering might pose a problem. It's not
a bug -- that is, it's not a mistake in the code that's making it behave
wrongly -- but a design flaw, and fixing design flaws means redesigning
something. If YouTube and Google+ can't use cookies to communicate, that will
have to scrapped and replaced by a server-side solution.
FWIW, I know that the folks at YouTube are now aware that this is an issue."
That post was made way back on 2013-12-16. The whole thread is here:
https://productforums.google.com/forum/#!topicsearchin/youtube/unable$20to$20comment|sort:relevance|spell:true/youtube/AUNr4ikX9pU
I've tried to enable exceptions to the 3rd-party cookie block, but Abrowser
doesn't seem to allow that. That's probably a good thing.
