President Volodymyr Zelenskyi told the Russians who are protesting in Russia that Ukraine sees this, and their protests mean that they heard us and began to believe us.
This is stated in Zelensky's video message.
The President of Ukraine also addressed the Russians in Russian: "I want to say to all citizens of Russia who are protesting: we see you. This means that you have heard us, you are beginning to believe us. Fight for us, fight against the war."