They changed from zlib to kraken.
Edit:
Code:
18:54:26 - Selected ARC/DS method for Data1a-01.bin was: xtool:c128mb:mkraken:core_2.9.5:dd3:l10,d128mb
18:54:26 - Selected ARC/DS method for Data1b-01.bin was: xtool:dd3+bcm
18:54:26 - Selected ARC/DS method for Data1c-01.bin was: xtool:dd3+zstd
18:54:26 - Selected ARC/DS method for Data1d-01.bin was: xtool:dd3:l10,d128mb
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21:10:33 - Overall input size: 86,89 GB
21:10:33 - Overall output size: 41,87 GB (Ratio 48.19%)
21:10:33 - Overall conversion time: 02:16:05
Devs packed all the USM videos inside PAK files so I extracted all USM videos from PAK files, 38GB in total, and compressed them with bcm.