The main topic of the video is how has changed the engineering design has changed in the last century. 

It explains that engineering design is influenced by politics, wars war and great achievements.
Being the main languages using in engineering design publications, The speaker examines the different tents types of different languages used in engineering design publications from the First World War to until nowadays.
In 1917, due to the First War War, the number of publications dropped. However, few years later, after the Russian Civil War finished ended, engineering publications increased in that country ___ (say which country).
During the Second World War, in the most of countries the number of publications descended decreased in most countries but except in Japan.
After Later on, due to the first nuclear weapon demonstration and also because of the Space Race, the publications publication frequency in Russia were was raised.
In the last few years, new topics has have become important taken center stage. e.g. One example is the Final Element Methods. At the end of the video, the speaker says that the most important language nowadays in present times is English, mainly especially in for business and technology. (OR "... is English, which is mainly used in business and technology." depending on what you mean to say.)

PS: Interesting topic! I have learned something new from your write-up :)