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.