The order this time is basically "which will cross the next 100M milestone first". Timber and TiK ToK should do it "soon" (within the next 3 months), whereas it's going to be a lot longer before the next video is VEVO Certified (YLIMD is still predicted to cross 100M first, despite its current streams being lower than TIO, BBB and WRWWR). C'Mon will likely never be VEVO Certified (current prediction has it at 10-11*years, and anything could have happened to streaming industry by then, good or bad).
For those interested (as it doesn't say), Timber is predicted to take 265 days to cross 900M, and 463 to cross 1B (still before WRWWR crosses 100M). TiK ToK may cross 400M in 609 days (still before TIO crosses 100M).