Ico and Shadow of the Colossus are absolute masterpieces, not only as video games, but as pure works of art. The interviews with Fumito Ueda are quite rare and short, but we have the chance to see one recently translated from japanese to english. It’s a little dated (from 2005, between the releases of Ico and Shadow of the Colossus). It’s very extensive, there are a lot to learn about the work he made on Ico (where we learn, with low surprise, that he has been inspired by Another World/Out Of This World among others).
Here is a more recent one from Eurogamer, in 2009: