It upped the ante in December by imposing a 7.2 billion roubles ($97 million) penalty for what it said was a persistent failure to remove banned items. Google has said it will study that ruling before deciding on further steps.
"(The FAS) found that the rules related to creating, suspending and blocking accounts and handling of user content on YouTube were non-transparent, biased and unpredictable," the FAS said in a statement.
YouTube was also the subject of a protracted dispute with Tsargrad TV, a Christian Orthodox channel, which Google blocked as the account was owned by a Russian businessman targeted by US sanctions.