Delete or deactivate references
Deleting a reference removes the file from the system; deactivating a reference instructs YouTube to stop trying to match the reference against newly uploaded videos but does not remove it. When you delete or deactivate a reference, you also specify whether to release any existing Content ID match claims made based on that reference.
Even though you create a reference indirectly by associating a <file> element with an <asset> element, you delete or deactivate a reference by using the <reference> tag and the reference ID. You set the release_claims attribute to specify whether to release existing claims made based on the reference.
The following samples show how to use the <reference> tag to delete, deactivate, or reactivate a reference.
Deleting a reference
This sample deletes the reference and releases any automatic match claims that YouTube created because an uploaded video matched the reference being deleted.
<reference action="delete" release_claims="True" id="REFERENCEID" />
Deactivating a reference
This sample instructs YouTube to stop trying to match the reference against newly uploaded videos. As in the previous example, this example releases any automatic match claims that YouTube created because an uploaded video matched the reference being deactivated.
<reference active="False" release_claims="True" id="REFERENCEID" />
Reactivating a reference
This sample instructs YouTube to start trying to match a previously deactivated reference against newly uploaded videos.
<reference active="True" id="REFERENCEID" />
* Nguồn: Youtube