The one failsafe method is to just post a link to the video, and folks can click on it to go to the other video site. But if it's a video on youtube, you can embed the video directly into your post rather than just the link. Just get the ID of the youtube video that's at the end of the link (in this case a6Jpcy2GZ1Q), and put it in between an opening and closing youtube tag:

a6Jpcy2GZ1Q

and once you hit post, it will show up right in your own post like this:

a6Jpcy2GZ1Q

or this:

oBTGgT_V5F8

Some videos on youtube prevent embedding, so if you do have issues on a specific video you might not be doing anything wrong; the video owner just chose to block embedding.

This now works for vimeo as well. Just get the Vimeo video ID (usually the last 6 or 8 digits from the URL), and put it in between Vimeo tags like this:

1292929

and it will look like this:

1292929

Now it works for Hulu ([hulu]), Break.com ([break]), and Smugmug ([smugmug]) as well...

I added the [ y ] code to represent youtube, for a little less typing for folks. Works exactly the same as the full code.

oBTGgT_V5F8

oBTGgT_V5F8

Hitting the https://www.ninjette.org/forums/images/custom_images/youtube.gif button at the top of the edit window will automatically create the youtube tags; you just need to paste the video ID in between. (Not the whole URL, just the video ID)