The guy on YouTube compares rhetoric, early policies and early public perception of Poroshenko and Zelensky.
The conclusion is there are a lot of similarities and the difference is that Poroshenko mostly delivered everything he promised (which didn’t prevent him from being the least popular leader including Stalin by the and of his term) and Zelensky is mostly engaged in PR show instead of real politics.
Another conclusion is that every their next president is worse and by the end of the term is less popular than predecessor. And every next elections work under principle: ‘anyone but the old guy!’.