LBRY is similar to PeerTube in open and decentralization, but all content metadata is written to a blockchain, which means everyone/anyone can access the index. This blockchain can then be searched (https://github.com/lbryio/lighthouse) or extracted to SQL (https://github.com/lbryio/chainquery).
Maybe they could implement a naive "view tracking" by having the client do small proof of work when they interact with content?
Similar to voting in NotaBug? https://github.com/notabugio/notabug