Assuming you have "customanims" by _Jennie_ here is the file location to drag and drop the YCD files.

mods\update\x64\dlcpacks\customanims\dlc.rpf\x64\anim\ingame\clip_mp_.rpf


And the to put in FavouriteAnims.XML
<Anim dict="anim@jojoone" name="jojoone_clip" />
<Anim dict="anim@killerqueen" name="killerqueen_clip" />
<Anim dict="anim@jotarowalk" name="jotarowalk_clip" />
<Anim dict="anim@diowalk" name="diowalk_clip" />
<Anim dict="anim@jotaropoint" name="jotaropoint_clip" />
