That’s probably most similar to what we’d call “flaked corn”, but it’s not something that we see commonly in stores (in America, at least). It is somewhat similar to “corn flakes” which are different.
It’s mainly used for brewing and distilling, and it’s made by taking dry corn, partially cooking it with water, putting it through a roller mill, and then drying it out.
Reading about farinha de milho, it actually might be similar to “corn flakes”, though. It’s a breakfast cereal made by taking ground corn and cooking it in water, and then drying it out in little sheets. It is super common to use as an ingredient in things like fried chicken batter, or as a topping to things you want to be crispy.
You don’t need a sous vide machine to do that, especially for something that only needs 30 minutes.
Take a cooler, and fill it with water at the right temp. You can add boiling water or room temp water to adjust up or down. Depending on what you’re cooking, you can aim for a few degrees over to account for the temp of the food dropping the water temp. With 12 yolks, I don’t think it’s necessary. Then just stick your food in and close it up. Depending on how big your food is, how big/good your cooler is, you might want to check the temp a couple times throughout the cook.