Lolesports missions

I got the "Watch 2 livestreams or vods on na.... to get chest and key" So i went on site watched for 10 mins 2 vods and didnt get anything so tried trough app Lol friends it said watching this video gets u rewards and i watched half of it not the whole and again another but still didntget the reward Am i supposed to warch the whole thing or ?
Best New

We're testing a new feature that gives the option to view discussion comments in chronological order. Some testers have pointed out situations in which they feel a linear view could be helpful, so we'd like see how you guys make use of it.

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