If you don't want to watch the video, here are some rough quotes (altered just a bit for clarity):

In my last year of office we put together a playbook to deal with a pandemic.  Scientists had been saying that due to globalization, world travel, etc, that there was going to be a pandemic, so I said to my team we need to put together a playbook.  We gave that playbook to Donald Trump, and he ignored it!  

I want to be fair, no matter who was president, people were going to get sick and people were going to die.  But if you look at a country like Canada, their per-capita death rate was 40% lower than in the United States.  That's more than 400,000 people!  People's grandmothers, people's fathers, people's moms, who would still be alive if Donald Trump had paid attention to the plan that we gave him.