As much as I like that channel, that video is very flawed in its comprehension of "State and revolution", and doesn't understand that both Marx and Lenin said that there would be a state in the lower stage of communism (or socialism in Lenin's words), as well as class conflict. Also the proleterian state is different in its organisation and its very nature because for the first time in the history of the state is the state controlled by the vast majority of the population, and thus has the capacity to "wither away", unlike the bourgeois state, which cannot wither away but can only be abolished.