BEIRUT, Aug 5 (Reuters) - Radiant in a long white gown and veil, 29-year-old Lebanese bride Israa Seblani stands smiling and posing for her wedding video. The scene is shattered by a deafening roar, and a powerful shockwave nearly blows her off her feet.

The dramatic footage captured the moment when a massive explosion rocked the Lebanese capital on Tuesday, killing 135 people and injuring more than 5,000.

Seblani, a doctor working in the United States, helped to check on the injured nearby, before fleeing central Beiruts Saifi square to safety.

A day later, she and her husband Ahmad Subeih, 34, a businessman in Beirut, were struggling to process what happened.