Tommy, thank you for your reply.
What I find is that, If I use /meetings/{meetingId}/recordings/{recordingId} and double encode the UUID regarding less whether it starts / or has // in the UUID. the videos are still got deleted and moved to the deleted records. But the cloud storage doesn’t go down. I have to ask the helpdesk to do hard sync for me.
If I call /meetings/{meetingId}/recordings/{recordingId} and only double encode the UUID starts / or havs // . The cloud storage shows correct storage after the vedioes get deleted.