Other formats? Do you mean other than DVD? I don't think it's on VHS tape ...?
There were only 13 episodes. So far I've seen the first four. I found it extremely iffy on historical accuracy. It's more like a multicultural group of LA kids being sent back in time. Here's one of the women they meet -
I really loved the old BBC Robin Hood (with Praed) which was very pagan-based and was hoping this would be along the same lines. Conceptually it is, but so far the plot is usually guessable from the beginning and the costumes and acting are just not great. It still might get better as it goes.
But again, it only lasted 13 episodes ...
When I compare these episodes with Firefly for example, Firefly was SO much better in every way - acting, dialogue, costumes, etc
So it's not that it's "hard to make a fantasy series that's great". It's just that Shawn Cassidy didn't get a great team together for this. It was a superb idea that wasn't played out well.