[2020] I see a lot of these league montages with a different POV of champions, do they all record it themselves or is there a website filled with these free to use clips? of like champions dancing and skins, etc...

Just the title

And i know there is a free program that lets you move the camera while spectating games, i tried it and i didnt really manage to make good use of it, so im wondering if there's that free stock of clips, thanks