Vimeo has a system outage where videos spent hrs waiting for conversion, and at the same time, as part of their default coding they fill their available space with  a promo for their enhanced service.   Seems reasonable.

Posts from Vimeo’s support staff explain the issue and diffuse concerns of a conspiracy:

We had a network glitch earlier that caused a lot of videos to be
delayed. We've since patched it up and resumed encoding. All your
videos should be available in the next few hours!

Trust us we are not intentionally causes errors for our free members,
the technical difficulties that began last night have been affecting
both free and Plus members.

No need to reupload. We are powering up our systems to run through the
backlog of files that accumulated due to this glitch. We have your
files though and are working on running through them all.

We have an outage, on the other hand, and get pressured from Senators and Attorney Generals to remove an integration feature that helps users.   StubHub continues to do what they want, accept pre-listings, and not offer the kind of guarantees to customers that we can.