Security settings you have may be protecting against the websites certificate or now requiring it for the site or you're logging in and out on and off
and it's verifying every time.
Recheck and check your sec settings and site settings too
edit on 07-31-2014 by mysterioustranger because: (no reason given)
In and Out...yes...more or less. I use a Chrome add-on that refreshes a tab every 'x' amount of seconds, in this case the Recent Posts page so I can
see near real time updates as it were. I have used it for years though without issue.
I am thinking it may have something to do with what windword said as the only thing relative to Youtube is the Subscribe to NLBS button and it is a
fairly new addition so it may be the cause...somehow.