I find it interesting when I watched the video without subtitles for me it was just a generic "notification bleep", but the subtitles taught me it is the Grindr notification sound..
.. and that's a cute cherry on the cake given the context ^.^
(and yeah no I don't use dating/hookup apps, I'm pure and innocent )
Welcome to your niu world ! We are a cute and loving international community Ｏ(≧▽≦)Ｏ !