https://en.wikipedia.org/wiki/Trans_fat#Health_risks
> Partially hydrogenated vegetable oils were an increasingly significant part of the human diet for about 100 years, especially after 1950 as processed food rose in popularity.[66] The deleterious effects of trans fat consumption are scientifically accepted.
> The most important health risk identified for trans fat consumption is an elevated risk of coronary artery disease (CAD).[72] A 1994 study estimated that over 30,000 cardiac deaths per year in the U.S. are attributable to the consumption of trans fats.[30] By 2006 upper estimates of 100,000 deaths were suggested.[73] A comprehensive review of studies of trans fats published in 2006 in the New England Journal of Medicine reports a strong and reliable connection between trans fat consumption and CAD, concluding that "On a per-calorie basis, trans fats appear to increase the risk of CAD more than any other macronutrient, conferring a substantially increased risk at low levels of consumption (1 to 3% of total energy intake)".[60]
Whole Foods, for example, banned trans fats 20 years ago, but they sell many products with vegetable and seed oils, and those are generally healthy.
>certain types of vegetable oil and hydrogenated oil shortened the survival of stroke-prone spontaneously hypertensive rats by decreasing platelet number, increasing hemorrhagic tendency and damaging kidney functions, which could not be accounted for by their fatty acid and phytosterol compositions.[0]
The whole article is worth a read. Note this is about vegetable oils in general but the discussion at hand is about lipids from meat vs lipids from other sources.
[0]Medicines and Vegetable Oils as Hidden Causes of Cardiovascular Disease and Diabetes https://karger.com/pha/article/98/3-4/134/272344/Medicines-a...
Based on what evidence? Here's a good roundup of our best evidence, and it shows that seed oils improve health outcomes: https://www.the-nutrivore.com/post/a-comprehensive-rebuttal-...
Since you like Youtube videos, here's a good talk between Gil Carvalho and Simon Hill that also goes through the evidence: https://www.youtube.com/watch?v=_ri4S7MLu3A
Another summary of the evidence on seed oils by Layne Norton: https://www.youtube.com/watch?v=L2fSaFnt0FM
I skimmed your video and it's the same old low-carb narratives with very little evidence cited which should always be a red flag. People who can't point to our best metaanalyses or human health outcome research on something to back their point will generally spin narratives because it's all they have left to do.