The man in the video was giving a testimony saying that he received a surprise call from a private number, when he picked up he was told this is the IDF. This video is likely the fourth strike part of step 3 in the timeline below, as it is a single strike distinct from the 2 consecutive ones based on number of hits heard. Journalists are also visible in the background ready to record footage in the direction of the strike area, this further indicates that this strike is at step 3 after the warning of another strike.

Timeline based on multiple footage and reports on the ground mainly from Anas Sharif, Islam Bader and Hossam Shabat:

1. First strike was carried without warning on Hamama School, 10 killed
2. As rescue efforts to evacuate victims started, IDF called some people warning of an imminent second strike. Paramedics and civilians hurried to evacuate, forced to leave behind the dead and wounded from the first strike
3. Second firebelt strikes, 2 consecutive hits and 6 detonations heard (3 detonations per hit), on the surrounding shelter area comprising a compound of 3 schools: Hamama, Rafidayn, and another so far unidentified school
4. Paramedics and ambulances finally obtain approval of IDF to enter and hurry to rescue victims. Most victims are women and children, with shredded body parts strewn everywhere. 17 killed 60 injured as of Aug 3rd