@ scjmc
when on youTube, there is a "share" link directly below the vids,
click it and it pops under a console which shows the embedded link.
you should choose, "long link" or "long url"
highlight that link and copy it into memory.
then when here on the forum, when posting, there will be a little
world icon with a sideways linkage thingy on it, it's for applying
a url link to something. click it and a little console pops up,
then simply paste you url link into that and finish with the post.
you can review your reply/post to see if it embeds the vid correctly
before you finalize your post.
I have noticed, that it doesn't like those youtu.be/ type links,
seems to need the youtube.com/ link instead.
try it out, hope it helps ya ...