It's obvious to any casual Somali unlooker. A lot of what they mistakenly believe is ''Uniquely Harari' culture is actually just copy and paste of Somali culture you find elsewhere and in other cities and in general. It shows that Harar was essentially just a Somali city with a majority Somali population until recently.
Even these wooden slates/boards we call 'looh'', they hold up as artifacts of culture in that same video. This is how Somalis teach and learn Quran , by writing on wooden slates with ink.
The boards displayed are carved in the same manner and style as well.
Qur'anic writing board, mid 20th century Unknown artist, Somalia
In Islamic Africa, the main usage of Qur’anic boards is to learn how to read and write the Arabic language, which leads to reading and memorizing verses from the Qur’an. In Somalia these boards are called loox. Before the use of paper, the loox was the main tool for the education of youth. It...
collections.artsmia.org
A tradition used to this day:
This is also described by the Portuguese in the town of Maydh in the 1500s just in case some Harari pseudo historian claims we got it from them. It mentions the big School where kids wrote on ink wooden boards
Apparently all the inhabitants ran away when they saw the Portuguese coming, but the Portuguese mention that there were two mosques and a school, probably a dugsi, where they had wooden boards and ink, Loox.
www.somalispot.com
The manuscript/bookbinding culture is Somali as well, its literally copy and paste of the same style you find Merca and other cities. Most of what they display as harari manuscripts are probably Somali as well, since Burton and others described the extensive collections and private libraries that was kept by Somalis inside the city.
The authentic chronicles that Cerulli uncovered/published ''Tarikh Al Mulukh(The History of Kings), Tarikh Al-Wali Asma(The History of the Surpeme Rulers) and Tarikh Al-Mujahid(The History of the Holy War) was in the hands of Somalis as well or copied from us.