With this parameter, Vimeo no longer uses cookies that identifies users
browsing our site.
They do still store some cookies, though; quoting from Vimeo player
parameters overview:
> When DNT is enabled, Vimeo deploys one essential cookie via the
> embeddable player:
> The __cf_bm cookie, which is part of Cloudflare's Bot Management
> service and helps mitigate risk associated with spam and bot traffic.
Not sure whether this counts as essential cookies in our case; they're
essential for Vimeo, but for us, they're third-party cookies, after all.
[1] https://help.vimeo.com/hc/en-us/articles/12426260232977-Player-parameters-overview
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