As for WDL, you can straight pack videos_ultra.dat with bpk. For videos.dat this does not work. It get stuck on 6.4%, I guess you have to unpack the file first.
Code:
Compressed 1 file, 3,704,538,840 => 3,145,628,556 bytes. Ratio 84.91%
Compression time: cpu 2.45 sec/real 401.17 sec = 1%. Speed 9.23 mB/s
All OK
Extracted 1 file, 3,145,628,556 => 3,704,538,840 bytes. Ratio 84.91%
Extraction time: cpu 4.22 sec/real 367.05 sec = 1%. Speed 10.09 mB/s
All OK