Here is the steps to make this work. ( I wish I had realized on was in the basic editing mode all this time. I didn't have all the fun icons for adding things. )
If you are going to insert a video, you need to make sure the line of code or URL has the format it needs. Specifically, for this forum software, it must have the part that says ".../watch?v=...." in it. If you see the URL doesn't have it, the" "[video ].. [ /video]" " on off brackets won't convert it correctly. If it sees that, it actually edits the first video bracket from " "
What is annoying is that when you right click on a video in YouTube and select " Copy video URL " you do NOT get the part with the watch? stuff. You get the more succinct URL, like "
https://youtu.be/goDVD_ffKGg ", which if you splat that into a new tab on your web browser WILL take you to the video. It just won't work with this forum's video links.
Now, some forums have a presetup "YouTube Video" button besides the generic "Video" button. Those ones just need the bare minimum of the video name, since the YouTube part is already assumed. All you need then, is the "goDVD_ffKGg" part from the URL.