Yet you can link to it from anywhere else on the internet, including from other pages on youtube, and anyone with access to youtube can watch it. A lack of free promotion is not censorship.
Ad absurdum, if the video was banned outright upon upload, it wouldn't be considered censorship under your definition, since upload and storage are also "free."
However, the contrast between a 70% average recommendation rate and a 0.1% recommendation rate for this video shows the algorithm's bias, fitting the definition of suppression of dissemination. According to Merriam-Webster, censorship includes "suppressing" content by restraining its usual course or inhibiting its reach.