No, it proves that they were definitely not not SU-35s. No one in the US owns a SU-35.
None of those jets listed aren't 4th generation fighters either, the likelihood of seeing one is very low, it's much more plausible that whatever aircraft was some American made F jet.
After a second look, no one in Colorado owns a fighter jet by Sukhoi.
this, it was also probably just training exercises.
