What does “co dwie głowy, to nie jedna” mean in Polish?

Co dwie głowy, to nie jedna is the Polish “two heads are better than one.” The shape is a proverb pattern you’ll meet again — co X, to nie Y, “X is a different thing from Y” — and the sketch plays on it: one man says it after the two of them manage to lift a wheelbarrow, and the other looks at their scalps and answers obydwie łyse — “both bald.”

The vocabulary around it is workshop Polish: koło wymienione (“wheel changed,” using the short participle Poles love for done jobs), nie mam siły (“I haven’t got the strength”), podnieś je sama (“lift it yourself”). One grammar curiosity: taczki (“wheelbarrow”) is plural even for a single one, like drzwi (“door”) and spodnie (“trousers”) — which is why the sentence says podnieść je, “lift them,” about one barrow.