Watching someone else do it is still less effective than bashing your head against the problem yourself before watching them do it. Whether or not you succeed

Watching someone else do it is still less effective than bashing your head against the problem yourself before watching them do it. Whether or not you succeed in solving it on your own, it will emotionally invest you in the problem and its solution while showing you what didn't work and having a better handle on the shape of the problem. This lets you get more out of seeing someone else work out the solution.