You can now 'embed' videos in your topic :-)

Video has to be hosted somewhere else, not here.

e.g. a youtube video, get the 'video url'  and just paste it in your post.    You can also paste a link to a video hosted elsewhere and that should work also.

Note....  do not post the "video embed url" !   Just get the "video url"

Eventually, you will be able to attach a video to your post the same way you attach a photograph, but I do not have that working yet.  Will let you know when it does.

Feel free to test it out by replying to this message.      If you have any questions, I will try to help (but I am just learning this myself.) 
If you want I can delete your test post when you are done testing.  Just say so.