Seven *burp*s is a series by Catboy that started as a movie that became a must-see. The link to it is

A clip from the Must-See, "Seven *burp*s" that started the series Many clamored for a sequel, so Catboy made one. Afterwards, Catboy made it into a series, where it only gets continued if the last part becomes a Crowd Pleaser.

It ended at part 5:


The plot takes an unexpected turn where the must-see leaves off, showing that the twins have partly undergone a personality switch