A content vault is secure storage where creators keep their original, unmarked files. Keeping originals in one place, with timestamps, gives you a clear record that you had the content first, which is useful evidence in DMCA disputes.
A vault can also generate marked copies to send. With forensic watermarking, each recipient gets a copy carrying a different invisible identifier, and the vault keeps a record of who received which copy. If a copy leaks and the identifier can be read, that record can help trace the leak back to the recipient. Watermarks aren't guaranteed to survive every edit or re-encode, so treat a match as strong evidence rather than proof.
Privly's vault stores your originals, can watermark copies you send, and creates fingerprints that help with finding copies of your content online.