I just watched this on HBO. If you were a fan of the Bee Gees, it's worth the watch. I enjoyed it very much.
I just watched the Sergeant Pepper's Lonely Hearts Club movie, which they starred in, along with a crapload of other singers and groups, except the Beatles.
The Bee Gees (short for the Brothers Gibb), represented the US, on the Live PBS Millennial special to welcome in the year 2000. I thought they were an odd choice to represent America? I can't recall what they sang.
I liked the Bee Gees, pre-disco, but I don't know that they were necessarily representative of American music. I thought they were British, or Australian, or something.
PBS had an hour show of them performing their hits several times. It will probably role around again.