Food safety is generally ignored as a point in brewing and food preparation in general. People rarely think about it consciously. When they do it is because they are questioning the safety of their food. This video goes over 5 of the more relevant food spoilage myths. The time stamp for each myth is: 00:00:15 You can smell bad food 00:00:44 Mould can be cut off 00:01:37 Reheating and freezing food 00:02:40 Refreezing thawed food 00:03:35 The 5 second rule Comment if you know what the coming video is on. Relevant links: The five second rule http://aem.asm.org/content/82/21/6490 Further reading if you are interested http://www.newhttps://www.cdc.gov/foo... https://www.cdc.gov/foodsafety/preven... http://mentalfloss.com/article/62400/...