The same KBS K-pop YouTube channel also posted the "normal", non-fancam versions of all the performances, and I think the view counts for these videos are worth a look as well. Here are the latest view counts, as of 18:75 UTC on December 26th:
1. Le Sserafim – Fearless + Antifragile: 1M
2. NewJeans – Attention + Hype Boy: 1M
3. Yuna (YuWonMi) – U-Go-Girl: 1M
5. Leeseo + Sullyoon + Eunchae + Minji + Hyein (Akiz) – Love Like Oxygen: 852K
6. IVE – Love Dive + After Like: 646K
7. Stray Kids – Case 143 + Maniac: 614K
8. Aespa – Girls: 552K
9. Le Sserafim – Hope: 528K
10. Wonyoung (YuWonMi) – Love: 512K
11. Enhypen – Blessed-Cursed + ParadoXXX Invasion: 418K
12. Nmixx – Dice + O.O: 412K
13. BoA – Girls on Top (ft. Taeyong + Jeno): 381K
14. Itzy – Cheshire + Sneakers: 350K
15. Ryujin + Chaeryeong (JYP Nation) – Caution: 318K
16. Jiwoo + Kyujin (JYP Nation) – You In My Faded Memories: 293K
17. Juyeon + Q + Sunwoo (The Boyz) – No Diggity: 268K
18. Forestella – Bad Romance: 262K
19. Kep1er – Wa Da Da: 260K
20. <All Performers> – No.1: 237K
21. Tomorrow X Together – Opening Sequence + Good Boy Gone Bad: 230K
22. Hyunjin + Han + Felix (JYP Nation) – As I Told You: 225K
23. Yuqi + Yoon + Liz (Y2K Girls) – After Breaking Up: 171K
24. Fromis_9 – Stay This Way: 155K
25. (G)I-dle – Nxde: 148K
26. (G)I-dle – Tomboy: 144K
27. NCT 127 – Faster + 2 Baddies: 142K
28. Miyeon (YuWonMi) – Festival: 136K
29. <All Performers> – Genuine: 117K
30. Seoho + Leedo + Hwanwoong (Oneus) – SexyBack: 104K
31. NCT Dream – Glitch Mode: 96K
32. STAYC – Run2U: 96K
33. Ateez – T.O.P: 85K
34. Yena – Smiley: 79K
35. BoA – Forgive Me: 66K
36. Oneus – Same Scent: 57K
37. The Boyz – Whisper: 42K
38. Pentagon – Feelin' Like: 28K
39. Kim Woo-seok – Switch: 9.8K
The thing that really stands out to me is how much (G)I-dle under-performed here. I don't expect them to out-view NewJeans, IVE, or viral Yuna, but even Nmixx/Itzy/Kep1er received significantly more views, despite those groups' music being widely criticised this year. Hell, Forestella somehow has more views.
On the other hand, Le Sserafim actually topped the ranking here, and I think this feat speaks to their growing reputation as the top group of their generation with regard to providing energetic, engaging performances.
