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Using dimensional analysis I estimate that the energy contained in the awful #Beirut explosion was approximately 12 Terajoules = 3 kilotons of TNT. For reference the "Little Boy" dropped on #Hiroshima was ~13-18 kilotons of TNT. #orderofmagnitudephysics
To estimate this, I used the following relationship between the energy of the explosion (E), the radius of the explosion (R), the time since explosion (t), and the density of air (rho). 
To determine the exact points in time in milliseconds, I wrote a python script to make subtitles for the video which show the time in milliseconds. I then loaded the video and subtitles into @VlcMediaPlayer. (with help from superuser.com/questions/9648…)
