If you have a file type not currently set to be allowed to in Joomla's media manager, this video will sho you how to add it - using the file format .webp as an example. This is also the solution to fix the "This File Type is not Supported" error message in the Jooml media manager - and maybe other places too!
When you are copy and pasting into your Joomla site from another web page, email, document or other type of source, JCE Editor is a great tool that can automatically clean up unwatned code in the content you are pasting. It's another great way to let your Joomla template handle the formatting of your content!
When you are copy and pasting into your Joomla site from another web page, email, document or other type of source, let your Joomla template handle the formatting! Get rid of as much css and source code as you can from the original content.
If you are getting the White Screen of Death (WSOD) or a 500 server error when trying to update extensions in Joomla, this video will show you some of the things you can try to get things working again.