Man accused of paedophilia died of multiple injuries on M4
Avon and Somerset Police said Mr Smith was seen falling from a height onto the carriageway at about 18:40 GMT.
Coroner's officer Alexis Camp told the inquest that Mr Smith, a married man, was identified by his fingerprints.
Ms Camp said a post-mortem examination gave Mr Smith's cause of death as multiple injuries.
A full post-mortem report featuring statements from Mr Smith's doctor, his family and witnesses, will be prepared for his full inquest hearing.
Maria Voisin, senior coroner for Avon, provisionally listed the inquest for 11 June.
Following Mr Smith's death, the groups involved in the livestream video called for people to "allow his family to grieve in a respectful manner".