I'm not sure where 3.6M for CU/Baylor will rank among other week 4 contests, but for context:Yeah. On the merits of "unranked Baylor vs unranked Colorado on network tv", that game should have pulled about 1.5M and, honestly, should not have been network while being lucky to draw 1M.
- CU/CSU was 3.25M and the 5th most viewed game that week
- CU/Neb was 5.67M and the 2nd most viewed game that week
- CU/NDSU was 4.67M and the 4th most viewed game that week (5th if you include Week 0 with Week 1)
Notre Dame was close; they were top 5 week 1 and 2 and got 7th in week 3 for their matchup with Purdue. Georgia probably has more overall viewers, as does LSU.
Examples of games with ~1.5M viewership so far this season: TCU/Stanford, Virginia Tech v. Vanderbilt, Temple v. Oklahoma, Western Michigan v. Ohio State, UTSA v. Texas, FSU v. Memphis, Tulane v. Oklahoma.