Mick Philpott, 55, and his wife Mairead, 31, broke down in tears at a press conference two weeks ago, just days after their six children were killed in an arson attack on their home.
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More than 120 famed actors and music stars said they are using their "privilege to speak out" to warn of Trump's "real and present threats".
A character is seen carrying a tray of hot drinks before slipping on some paper, with one sheet appearing to be covered with Arabic script.
A historic night in Philadelphia saw mixed emotions as a bitter rivalry was settled before Bill Clinton made his pitch for his wife to lead.