YouTube shorts and Instagram reels are a rip-off of TikTok.
Live streams. Twitch is built around them, but you can also do them in YouTube and Instagram.
Stories. I don’t even know who did them first, but now they are identical in Facebook, Instagram, and Whatsapp.
Lol before tiktok there was vines on Twitter, tiktok ain’t original either
Tiktok is just a rebrand of Musical.ly