Download sound clips? Would Riot be okay with that?

So I have a sort of silly hobby of making playlists for each champion I play. They're usually thirty minutes or so long. I decided it would be really neat to string them together a little more artistically and add stills and make a YouTube channel. I know its REALLY ambitious, but I want to make a playlist for every single champion. I wanted to start with Rek'Sai. I really wanted to personalize each playlist to the character not just by the type of music, but my mixing or breaking the songs with clips of their voices. Unfortunately, I discovered there's nowhere to simply save them as a sound file, only as a web link. Would it be possible for me to get a few of these sound clips for each character, considering that this is not for profit?