He argues that English is considered a Germanic language because of its syntax but that it actually has more Romance language words, around 50% of the language, compared to Germanic words, around 25%.
But he points out that common usage tends towards German. Example of an all Germanic sentence of the kind used in daily life.
And he points out that many of the Romance words came into English due to the political prestige of France and to science, which used Latin words. An example of the former is embassy and of the latter is hypothermia. Hypo is Latin, Thermia is Greek, and ia is likely Greek via Latin.
This slide shows a sentence that is half English half Romance. A sentence taken from a newspaper that is more likely to use French words due to the topic.
Here's an interesting list from the video that gives you a sense of how Germanic words dominate in certain cases and French in others: