I'll break it down for you.

Mueller starts report by saying he is operating under policy against indicting sitting POTUS. As such, he cannot make claims that Trump is guilty of x, y, or z because that would not allow Trump the right to immediately defend himself in court (due process). Thus he can only either find Trump innocent (i.e., clear him), but never guilty. So for the rest of the report he's going go provide the evidence he found and give it to Congress to decide what to do.

He discusses evidence for conspiracy with Russia and reports it as inadequate (i.e., Trump is innocent of collusion).

He then goes over 12 items re: obstruction, lays out the evidence in each item, which varies in strength from zero to strong for each item (summarized in the graph at 9:00), and says 'there you go, that's my report'.

In no case does he 'clear' Trump of obstruction like Barr claimed. On the contrary, he makes it clear that there is strong evidence for at least a few of the obstruction items (including attempts by Trump to fire and/or curtail Mueller lol) and leaves it at that. Nowhere in that report will you see anything that says 'innocent of obstruction'.