Since this is a purely phonetic Romanization, I've made a few changes that might be confusing at first glance.
I am Dutch, and in my language, the Germanic umlaut has gotten another function. It indicates a sound change. Therefore, there can be no more confusion about diphthongs; proelo - proëlo. The e is a new sound and is pronounced apart from the o.
Also, j's in my videos are pronounced as a y, as in 'you'.
Please comment if you have any questions!