Highlighting high bitrate could be better.
Right now, I have only seen a green bitrate when it was 1300+, but VERY few files have that bitrate.
Rather, why not highlight the highest bitrate in the node? (group, subtree, whatever you want to call it)
You could then extend that concept to all the other attributes: ie highlight the
highest value in a node/group in green for EACH attribute (at least bitrate, size, time, maybe date, or even filename length).
You could even make which attributes to highlight configurable, in case it's too confusing to the user.