I really like that it lets me claim my own videos for free, which is rare in this day of age when most people are trying their hardest not get sued by other creators who have claimed what they think was theirs all along! There aren't many downsides either but there's nothing bad enough about them as far how often you'd use something else if so inclined (and why would we?).
It does help out immensely since anyone can upload anything at any time anywhere without having an actual business plan or budget set aside first - just make sure whatever video/channel concept idea makes sense from start-to finish because once uploaded everything will be locked down until proven otherwise unless paid for beforehand through another service such has Patreon etc..