I HAVE FOUND THE FIX!!!!
Thank you for your reply. I have all ready done that. Except the safe mode.
This what I did to stop autoplay
First click on Apple in left upper corner. Then select System preferences. Then select Securely & Privacy.
In the screen select Privacy at the top if not highlighted all ready.
Then on left side scroll down till you see Full Disk Access and click on it. Look for Terminal in right window. Make sure the box next to it is checked. If it is not there you can add it by clicking the + button below. You might have to unlock the lock on the left side lower by clicking on it and entering your password to open it. Once Terminal is there and box is checked, Lock the lock and close screens.
Go to your applications folder or in finder and open Terminal. In terminal write or copy the following line and paste in to terminal.
defaults write com.apple.Safari IncludeInternalDebugMenu 1
Press enter and close Terminal.
Shut down Safari and open it again and a new menu called Debug will appear next to help. Click on debug and Select Media Flags and click disallow inline video. And try that, If you are ok with the results you are all set
If videos are still autoplaying, Select Debug, Media Flags and click on Disable AVFoundation. That should stop them all.
If you want to hide Debug menu copy and paste the following.
defaults write com.apple.Safari IncludeInternalDebugMenu 0
That will hide it.
I recommend that you leave Debug there, If you want to see the video you may have to uncheck both
Disable AVFoundation and Disallow inline video.
You should copy this and put it into notes or stickies so you have a copy.
That is working great But Apple is going to have to fix this so that HTML5 Video and other videos that can Autoplay can be stopped without having to do this.
Hope this works for you as it did for me. Thanks to all who have helped me
