The "Remind white people of what happened 300 years ago" in question is an explainer on how a 19th century Super El Nino wiped out over 3% of the world's population, mostly in Asia, despite the fact that these regions had experienced famines and droughts at numerous points in their prior history. The video then asks the question, "Why was this so much more deadly?"

The explanation posits that this was only possible due to the multiplier of the rapidly expanding British empire. It is not posited as British/white people are bad, it is posited as society, politics and trade creating a multiplier effect. The whole point of this section in the video is to setup the final chapter of the video, asking the question, "Could this happen again?", which feels like a valid question given that society, politics, and trade have exponentially evolved since the 19th century.

This section of the video is portrayed so agnostically that I felt compelled to reply to your vague criticism.

Here is the video linked to the timestamp of the aforementioned section, which is only around 2 minutes long, so others can pass their own judgement: https://youtu.be/69o-8Mtd3Kc&t=330

Not sure how you can be here for the science if you're not willing to be here for the history.