올리다 is putting something up, and the range is wide. 별 기대 안 하고 올렸는데 "I uploaded it without much hope" is posting online; 머리를 올리다 is putting your hair up; 양념하고 올리다 is putting meat onto the grill; 속도를 올리다 is raising the speed. The -고 clause is what you did just before. Its intransitive partner is 오르다 — a thing rising on its own rather than being raised.