Indeed, the word 'youtube' is part of the list of words to be rejected without moderation. We have had a lot of spam some years ago, which caused a temporary shutdown of ask.sagemath.org and we had to migrate from WU to OSU to be able to restart the service. We set up a lot of antispam measures in order to be flooded anymore. This keyword-list is one of them. The most powerfull is definitely the firewall we set up. Also, currently, every newcomer has her first post moderated. It is hard to know whether this list blocks more spammers than regular users.
Let me remove the word 'youtube' from the list, and we will see...
this below is the question which produce the error
title:sage cell difference between Permanent and short link
Hi what is the difference on sage cell between Permalink and Short temporary link does it mean that Short temporary link will be able to be used only a short period of time as its name suggests ?
no in fact the error is produced by a part of text that I can't write here !!!
I try to put the forbiden text in response: no it does not work too !!!
trying to add few underscore around:
P_ermal_ink is not usable in Y_outube comment, there are characters that are not accepted for a l_ink and the l_ink's length is in_sane .
yes it is ok with the underscores added ;-) please can someone try to removes all the _ in the text above and write it in a comment below? to see if the problem comes from my pc or my account.