There is a song played at around 8:30 in episode 492, which I have not heard of yet, but I really like. Is this an unreleased OST, or was it released in one of the movies? It would really help if somebody could answer. Thanks.
It's an unreleased OST. There are many OSTs that were left out from the 3 OST albuns. I've searched in multiple youtube channels for that specific one and I didn't find it.
You could send a private message via youtube to one of those guys that are constantly publishing those unreleased OST in their channels.