The DNT parameter on a Vimeo Player Embed prevents us from setting any new cookies on your browser during that viewing session. However, it does not prevent your browser from sending cookies that were already stored from previous visits to Vimeo. Suppose you've previously watched a video without DNT enabled. In that case, your browser will automatically send those existing cookies with any new requests for Vimeo content, and this is a default browser action that we cannot control.
If you apply a DNT parameter to the player, the only cookies that will be set are player_clearance, cf_clearance, _cf_bm, and _cfuvid, as these cookies are considered essential to the secure operation of the player.
Vimeo’s embeddable video player sets the following cookies:
| Cookie | Function | Expiration |
| vuid | Vimeo-generated ID used for generating analytics information for the video owner. | 2 years |
| player | Stores preferences for player controls (i.e. volume, stream quality, captions). | 1 year |
| flags | Specifies feature flags enabled by the video owner. | 1 year |
| [clip_id]_password | Stores an encoded password entered to authenticate a password-protected clip. | session |
| [webinar_uuid]_webinar_registrant | Stores the ID of a user who has registered for a webinar. | 7 days |
| lc_[hash] | Stores the ID of a user who has submitted information through a video registration form. | 7 days |
player_clearance |
Vimeo cookie used for bot prevention | 7 days |
| _cf_bm | Cloudflare bot manager manages incoming traffic that matches the criteria associated with bots. | 30 minutes |
| _cfuvid | Cloudflare cookie used to enforce rate-limiting rules. | session |
|
cf_clearance |
Cloudflare cookie used for bot prevention. | 1 year |
You can find additional information on Cloudfare cookies in Cloudflare's documentation.