Safari won't load YouTube

Safari can’t open a website

 Safari – slow page loads

 Safari - Unsupported third-party add-ons may cause Safari to unexpectedly quit or have performance issues

Safari doesn't load a page or webpage items are missing

Web Content not responding

Try setting up another admin user account to see if the same problem continues. Please post back on whether or not this worked. Also try the Safe Mode. Please post back on whether or not this worked.

Isolating an issue by using another user account 

Safe Mode - About

If it works in the Safe Mode, try running this program when booted normally and then copy and paste the output in a reply. The program was created by Etresoft, a frequent contributor.  Please use copy and paste as screen shots can be hard to read. Click “Share Report” button in the toolbar, select “Copy to Clipboard” and then paste into a reply. This will show what is running on your computer. No personal information is shown. If the log won’t post, try posting it in Pastebin and provide a link in a reply        Pastebin

Etrecheck – System Information

You are welcome. If you want, you can try running the Etrecheck report in your normal account to see if it shows anything. If the log won’t post, try posting it in Pastebin and provide a link in a reply        Pastebin

I don't see anything that normally causes problems. Try restarting the computer and don't open any programs but Safari to see if it works better.