The tag "sponsor_6601" appears to be a unique identifier for a particular sponsor or advertiser in this porn video. In the context of adult entertainment, many videos are produced by studios or creators who rely on advertising or sponsorship deals to fund their content. These tags help to track and attribute the revenue from these arrangements.
The number "6601" could be a specific code assigned to a certain advertiser or sponsor, which can help in organizing financial records, identifying the content creator's partnership, or for analytics purposes to assess the performance of different advertisers.