Yeah it's wierd. There's a few big clubs like Depor and Racing Santander playing against clubs who have 3000 capacity stadiums. Standard is probably all over the place.
They are in the Segunda B, which is basically the third level. It's regionalised and split into four groups. About 80 odd teams in total. Their big derby game is against Celta Vigo. Well last week they lost a league fixture to Celta B.
Watch the Si Ferry ones. Never heard of him but he played for Swindon under Di Canio. Some hilarious stories about him. The second half is him at Celtic, the stories about Thomas Gravesen are gold.