I would like to use video for certain posts of mine, so I'm simply wondering if I try to post a video (using photoshop): would the forum accept and play it or tell me I made an error...

You can make videos with photoshop? :mellow:

I've no idea if you can play a video like a moving image directely in your post, but you can always upload it on youtube and link to it.

I see no problem with you linking to video's in your posts. That's been done before, just not in an RP.

You can't use HTML though. That's been disabled.