The exact original recording behind this clip is not widely documented, so it is best understood as a French reaction phrase that found a second life online rather than a line from a named film or show. C'est rigolo hein is everyday spoken French for it's funny, isn't it, and that familiar, conversational wording is part of its appeal. On soundboards and in short-form videos it is shared as a quick, language-flavoured reaction, often by creators who want a playful comment that stands out from the usual English catchphrases while still being easy to understand from context.