Is there a way to embed an iFrame (video, etc.) in a forum post?

I am looking for a way to include videos directly in my community that are too large to upload to our community in the cloud (file size limit is 511MB).

Thanks for any insights you may have!

I'd also like to know how to do this. Anyone have any instructions etc?

I'd like to get iframe embeds to work with a particular site.

If you have permission to post HTML, then yes.

If not, your best option would be to have a plugin created to treat whatever service you are using for your videos just like any other social sharing service (i.e. when you paste a youtube URL into a post it turns into a video - you can do the same with other services but you would need a plugin to do so).