As you already have so many Youtube extensions, you should check out sponsorblock. It lets you automatically skip ads within the video itself. And if not done yet, you can do it yourself for the community.
People who have never heard of milk free ice cream are a bliss. So much to learn about the world. Must be wonderful to experience all those incredible things every day.
Honestly that sounds cheap. The professor probably earns more per hour than that.
How much time would it probably cost him to teach the student, to get his grades straight? 10-20 hours? Double that worth his salary and maybe it will be worth for him. Lets say he would normally earn 25€/h x 10-20 x 2 = 500-1000€
Rub everything off with alcohol and reaply thermal paste. A 3-4mm dot should be enough in the center. Put everything together again while applying even preassure on all corners/ screws. If there is no difference in temperature, the problem is most likely not the appliance of the thermal paste. Probably some manufacturing mistake. I would reach out to customer service then.
The joke is probably that he drinks himself some beer. In Austria this can be quiet normal. Nobody bats an eye as long as you don't do this at work.