Dear ,
I have problem with watching video from youtube site. Screenshot in attachment How can I repair?
I am upgrading only with smxi , installing soft with mx-installer.

The few times I have had this (though with other sites) the cached content was trying to load when it should have been updated. Typically this is because of a bad line in the webpage saying that it has not been updated when it has. The remedy in this case for almost all instances is to hold the 'shift' key and click the reload icon to force a full page reload ( ignore cached content and download everything needed from the server)