[kelnos]

There's a difference. If someone manually claims a video through YT's content-ID system, they have to provide timestamps (this is enforced by Google).

If someone just sends a regular DMCA notice, they're only required (by law) to provide the URL, and Google has no choice but to take down everything at that URL, until/unless they receive a counter-claim from the poster.

The content-ID stuff is a convenience outside the law, if content owners (who have access to it) choose to use it. Anyone can file a DMCA notice, and Google has to respond in a particular way in order to be compliant with the law, and cannot impose extra requirements (like timestamps) before acting on the DMCA claim.

[avianlyric]

The law also requires that the DMCA notice describes what copyright is being infringed on. [1]

You can’t just go “this video infringes on my copyright, but I’m not going to tell you which copyright”. That isn’t a valid DMCA notice at all.

[1] § (512(c)(3)(A)(i-vi)) https://www.law.cornell.edu/uscode/text/17/512