You can follow the instructions below to prevent audio and video files uploaded to forum posts from being downloaded by users:

1. Log in to your Website Toolbox account.
2. Click the Integrate link in the main menu.
3. Click the Custom Code link.
4. Insert the following code into the Forum Head Tag HTML Code textbox:

   <script>
   window.addEventListener("load", function(){
   	if(jQ('#posts-list').length || jQ('#topics').length) {
   		jQ('audio, video').attr('controlsList','nodownload').on('contextmenu',function() {
   			return false;
   		});
   	}
   });
   </script>

5. Save the changes.