Tisha Be’Av this year coincided with the Muslim holiday of Eid al-Adha, Festival of Sacrifice.
The Grand Mufti of Jerusalem Sheikh Muhammad Hussein demanded that the site be protected and held the Israeli government responsible for any escalation.
Political disputes within Arab and Muslim states have spread to the dates of religious holidays.
The video was posted in an apparent response to comments made by US Rep. Rashida Tlaib in which she said she felt "a calming feeling" the Palestinians were able to "create a safe haven for Jews."
The mufti claimed that Israel was carrying out excavation works at the Umayyad palaces, under the northern part of the Islamic Museum, which is located west of al-Aksa Mosque.
“Set out for the al-Aqsa Mosque,” Fatah said on its official Facebook page, "break the Israeli siege that aims to change the historical sites of the holy city and judaize them.”
The PA president rarely condemns attacks on Israelis.
More evidence emerges of the strong ties the Muslim leadership forged with officials from Nazi Germany.
The highest religious official in the Palestinian Authority, the Grand Mufti of Jerusalem, called on security forces to ensure compliance.
The National Library has uncovered a telegram written by Heinrich Himmler and sent to Mufti al-Husseini, in which the Nazi leader expressed his support for the Arabs of Palestine.