Of course it's correct that some vegan foods might cause more harm than some non-vegan foods but I think it's actually pretty rare. I doubt that there is any vegan food that causes as much harm per calorie as eating chicken or eggs. If you're comparing packaged foods with small amount of animal product then this might be true.
From a climate change perspective, I looked into it a fair bit and only rice and food flown long distances on a plane can truly compete with meat and dairy for climate impact, so I tend to considerably reduce the amount of rice I eat.
I do buy almonds, but that's because I'd forgotten about their negative impacts in recent years to be honest or at least didn't have it on my mind when I bought that. I probably should stop eating almonds. However, if you eliminate both almonds and animal milk it might be worth reviewing whether your calcium intake is sufficient.
The thing is in theory you can do better than vegan by carefully weighing all harms, but it's rather impractical.
At least two statements in the video I disagree with:
“a vegan who eats high impact foods, flies frequently, and judges others for imperfection is not automatically better for the world than an omnivore who eats local, seasonal food and makes thoughtful choices about what they consume”.
I think this is not true. I think the first is just better. All the data and studies show that local and seasonal has minimal impact, and certainly nothing compared to the impact of killing someone and eating their body.
“some vegan foods cause tremendous harm”
very few vegan foods if any cause tremendous harm. I believe all the almond farms cause tremendous harm, but I won't believe one pack of almonds causes "tremendous" harm.
The trouble with this video is if you go vegan and someone says "and now you have to also stop eating almonds and rice to be consistent and to only eat local, seasonal foods" then there's a risk people will just be like "f**k this" and just give up on ethical eating entirely and go back to eating meat which will cause far more harm than successfully convincing someone to stop almonds. Perhaps better to celebrate the veganism already achieved.
That's why I mostly only advocate to not eat fish, meat and eggs.
If you want to eat ethically, veganism is 95% of the answer. Local food is 0.1% of the answer. Who cares.