I have a question about youtube video support in version 3. I know there are mods availible for phpbb2 so post can contain youtube videos. Is this anything that might be included in the new version? I have not seen it in beta5.
You could probably do it with the custom bbcode feature of phpBB3 when the time comes, there have been several posts on this forum where people have posted examples of custom bbcodes for displaying you tube videos so you might want to search the phpBB3 support forum