Best way to Make Replays of League games?

Hi guys! I was looking to start recording my games so I can watch myself and also possibly upload the games on youtube. What is the best replay thing (I don't know what it would be called) to do this with? I went on, and when I clicked the download button, the website went to a page that had a warning saying: This page contains harmful content... So, is this website not safe, and if so, what should I use?
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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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