The strongest hero.

I think that, considering the rules, the topic title sounds incorrect. And besides, judging a hero's strength based on videos seems odd... The topic is more about the storyline (who got more kills) than about the hero's actual strength.

But how else? Everyone levels up heroes differently. Regarding the videos:
There are some inconsistencies between the battle and the video. For example, the video of Biara's death. You defeat her with Zeheer, but in the video, she is killed by Isabel.