Another banger from my favorite mostly Ukrainian (with some Belarusian, Russian and American help) cover band. These guys are so good. I have never heard such vocal and instrumental accuracy in covers of songs. For a particularly layered and baroque example, please see my favorite cover of theirs: Earth, Wind and Fire's "Fantasy":
https://www.youtube.com/watch?v=YHRt_EtbzdYIf you go through their catalogue, you will see that they cover mostly Chicago songs, but they do some EWF and other stuff. I think Danil, the lead male vocalist is amazing, although the lead female (Ksenia) for this song is really, really good, too.
Everyone's favorite psychedelic pre-metal song: 25 or 6 to 4 by Chicago:
https://www.youtube.com/watch?v=9_torOTK5qc
There doesn't seem to be anything here yet