Does watching the videos of non Muslim work about islam such as Islamic History by western scholars recommendable?

Yes there is no problem but make sure that if it has wrong message or manipulated history ( as you know the main aim of Orientalists and Orientalism was to misguide Muslims from their own faith and history) then you have to explain for them at the moment that this not real Islam. Children are just like clay, any shape you want you can give them,
So please be careful if you want to show anything which has been created outside the Islamic culture. Because 100% it would have a message where they would defame Islam even sometime we can’t realise.