The fundamental distinction is government vs private.
Police carry weapons that can kill, and have jails that can lock you up for a long time.
Youtube has none of those negative things. They have positive things: great technology and a huge audience. The worst they can do is deny you access to those.
In general, you're not owed an audience. The police won't bring you an audience for your protest, and Youtube won't bring you an audience for your videos unless they want to.
Police carry weapons that can kill, and have jails that can lock you up for a long time.
Youtube has none of those negative things. They have positive things: great technology and a huge audience. The worst they can do is deny you access to those.
In general, you're not owed an audience. The police won't bring you an audience for your protest, and Youtube won't bring you an audience for your videos unless they want to.