This is just one of an assortment of problems you may have involving videos and Safari extensions. If you suspect other foul play here, you may get help from Apple Support Communities threads such as and .

My general advice is, whenever you have a Safari symptom that does not show up in other browsers, go to Safari -> Preferences -> Extensions and turn the slider switch to Off. If the symptom vanishes, you now know the source of the problem. Turn Extensions back on and begin disabling extensions one at a time, until you locate the culprit.

Last week, when I attempted to load the Bill Pay page of my bank's website, I was surprised to get a . This has never happened before. The page did not load. Instead, a message appeared that apologized for the error and informed me that my Bill Pay page no longer existed. This was not welcome news.

I called the bank to see if they knew what was going on. Their advice was for me to make sure that I wasn't blocking cookies. My first response was to dismiss this suggestion, as I had not made any recent changes to my cookies settings. The page had loaded just fine the day before, so I saw no reason to think that cookies were behind the current failure.