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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def save(self, create_multiple_renditions=True, preserve_source_rendition=True, encode_to=enums.EncodeToEnum.FLV):
 """ Creates or updates the video """

        if is_ftp_connection(self.connection) and len(self.assets) > 0:
            self.connection.post(xml=self.to_xml(), assets=self.assets)
        elif not self.id and self._filename:
            self.id = self.connection.post('create_video', self._filename,
                create_multiple_renditions=create_multiple_renditions,
                preserve_source_rendition=preserve_source_rendition,
                encode_to=encode_to,
                video=self._to_dict())
        elif not self.id and len(self.renditions) > 0:
            self.id = self.connection.post('create_video',
                video=self._to_dict())
        elif self.id:
            data = self.connection.post('update_video', video=self._to_dict())
            if data:
                self._load(data)