Not to be a downer, but I don't believe access to information is the root cause of russians' support for genocidal imperialism and authoritarianism.
FWIW, russian language YT channels have been available since 2010, including international services (DW, BBC; in russian) and local opposition leaning channel such as TV Rain (Телеканал Дождь).
For the average russian the fear of shame associated with military defeat and the rejection of the notion "that russia is the greatest culture there is" stand above all other considerations. Even the lives of their own soldiers or the future of their children (the millions of lives they have destroyed in Ukraine, Georgia, Moldova, Syria is not even on their radar).
I am not saying this is true of every single russian, but when 65% [1] to 85% [2] of the population are supportive of genocidal imperialism, this is a society-wide problem and not an issue tied to a single individual or a small group.
[1] Estimates of support for the full scale invasion of Ukraine accounting for preference falsification via list experiments and comparisons with direct polling. With the caveat that the authors of the list experiment believe their methodology under-estimates the true level of support (i.e. it is higher than 65%). [2] Estimates of support for the annexation of Crimea both via list experiments and direct polling (preference falsification with respect to the annexation of Crimea is practically nonexistent even though alleged russian liberals claim otherwise).