Place it in the middle of a short edit, just after the setup moment, then follow it with the Baby Laughing Meme. For a drier reaction, cut to Bruh instead and let that single beat close the scene.
About this sound
This is a short Russian vocal clip, about nine seconds long, built around a repeated la-la-la chant delivered in a playful, singsong voice. It feels silly and lighthearted, like someone cheerfully singing nonsense instead of saying anything serious. The loose, carefree delivery makes it easy to picture as a joke reply, a teasing hum, or a way to brush off a conversation with humour.