After installing Mac OS sonoma for a few weeks my mac quickly ran out of storage. I did a scan using cleanmymac and found this huge folder in /Library/Application Support/com.apple.idleassetsd/Customer/:
I opened the folder and found it full of high-quality landscape videos, which is probably used for screen savers. Would anything go wrong if I delete everything in the folder and use the old screen saver?
Try renaming the folder first to see if something breaks.