It's worth noticing that the new uploads are in fullHD.
The upload of again was updated with a 4K version, so this is her first 4K video. The quality is insane. Interesting to see this is the only 4K upload on avex's youtube channel.
https://www.youtube.com/watch?v=8Twz6IbavAA
I guess they are experimenting with her PVs. TAKE BACK looks really good in fullHD, even the flaws in her skin are showing. But in NEVER ENOUGH's case, the original avex upload is better. So who knows.