Clarification notice from Shaykh Dr. Yasir Qadhi:
UbaydAllah ibn Jahsh was married to Umm Habiba not Umm Salama. The Prophet (saw) married Umm Habiba bint Abi Sufyan after she separated from UbaydAllah ibn Jahsh.
The mention of Umm Salama at 40 mins 40 secs of this video was a slip of the tongue. Umm Salama was married to Abu Salama.