First oncidium & clueless

[Pumpkin92]

Update:
I couldn't stand not being able to see the roots and couldn't figure out what it was planted in to save my life. So I bought a clear plastic container, drilled drainage holes, cut side slats, then cut the plant out (it wasn't going quietly).

So here's what I found:
https://www.flickr.com/photos/619534...7654209318509/
https://www.flickr.com/photos/61953428@N06/18692175540/

Firstly I can't tell if those roots are healthy or not. They feel firm but look brown-ish. I sprayed a few to see if they'd change colors but they didn't. Then it looks like its planted in porous soil. I don't really know how to describe it.

So new questions:
Does it still look healthy? How do I water it now (less/more)? Is that media going to be a problem until it finishes blooming? Any other advice?