To support some of what you’ve said and add some more:

Rapeseed Oil (Canola Oil) Health Effects

• Video claim: Rapeseed oil contains trans fats and toxins linked to cancer and other diseases.
• Independent sources: A study published in a National Institutes of Health journal and articles from WebMD and the British Heart Foundation indicate that modern rapeseed oil is low in saturated fat and high in beneficial unsaturated fats, including omega-3 and omega-6 fatty acids. It is considered a healthy choice for lowering cholesterol and supporting heart health. There were historical concerns about erucic acid, but modern rapeseed oils are virtually free of it. While some processing is involved and some oils are genetically modified, research generally suggests that the products are safe.

Maltose and Blood Sugar

• Video claim: The maltose in oat milk gives it a glycemic index higher than white sugar, with the same blood sugar effect as a can of Coke.
• Independent sources: Multiple sources confirm that the enzyme-based processing of oats creates maltose, a sugar with a high glycemic index (GI), which can lead to a quicker rise in blood sugar than other plant-based milks or dairy milk. One source lists the GI of maltose as 105, which is higher than glucose. However, other sources provide different GIs for oat milk itself, ranging from 60 to 69, which is considered a medium GI. Experts also note that the effect on blood sugar depends on how the oat milk is consumed—for instance, a small amount in coffee will have a less significant effect than a large serving on its own.

Oatly’s Environmental Claims

• Video claim: Oatly was accused by the UK Advertising Standards Authority (ASA) of making false claims about carbon emissions.
• Independent sources: The claim is partially correct. Several news outlets, including The Independent, reported that the ASA banned some of Oatly’s adverts for making misleading environmental claims. The ASA ruled that Oatly’s claim of generating “73 per cent less C02e vs milk” was misleading because it only compared one of their products (Barista Edition) to whole cow’s milk and consumers would assume the claim applied to all their products and all types of milk. The ASA required Oatly to be more specific and clear in its claims going forward.

Blackstone Group Investment

• Video claim: Oatly faced backlash for accepting a $200 million investment from the Blackstone Group, an investment firm with alleged links to environmental destruction.
• Independent sources: This claim is also correct. News articles from The Guardian and The Counter confirm that Oatly received a $200 million investment from a consortium that included the Blackstone Group. This led to significant backlash from activists and customers, who pointed out Blackstone’s alleged ties to Amazon deforestation and its CEO’s donations to the Trump campaign. Oatly defended the decision, stating that the investment would help them expand their sustainable mission and that they were trying to “move global capital in a sustainable direction.” Some independent retailers did boycott the brand as a result.