if you have some basic php skills you can use the k2 templating features which gives you endless possibilities for templating and designing your site's articles.
the only thing i don't like about k2 is it's front-end publishing / editing interface, which requires lots of work if you want it to look and feel good for a common user, not to mention RTL. but that's only applies for editing, the content templating itself is actually great on that matter.
The good news is that K2 v3.x will make frontend editing a lot better overall and definitely easier for users.
i had a small problem with the design and i wrote Omer - the developer. he responded in 2 hours and sloved my problem immidietly.
i'm giving it 4 stars instead of 5 only because i doesn't have the option to align the thimbnails bellow the main video, but i guess this is somthing that will be added in future releases.