Is Wikipedia a quality resource?

I've encountered quite differing opinions about the use of Wikipedia and YouTube by students. I, personally, do not accept either as a reference, although I do happily allow students to use them as jumping off points. I know other educators in the same school who do accept Wikipedia as a direct reference, but my policy will remain the same, for a few reasons.

While I understand that Wikipedia is generally accurate, the fact is that students won't know what is true and what is not, and there are certainly some mistakes on Wikipedia. More than that, I tend to find Wikipedia can oversimplify things in ways that can be misleading if the reader isn't already well informed. I certainly don't want students learning false or misleading information.

A larger reason is that when I require references from my students, the purpose is not simply to verify the information. The greater purpose is for my students to learn how to find and vet references. Always going to the same website entirely defeats the purpose of this exercise. There's an amazing wealth of resources on the internet, and using Wikipedia can discourage students from looking for further sources. On the other hand, I do allow students to start with Wikipedia, and follow the references down on the bottom of the page. In this way, Wikipedia actually provides a good example for students.

I don't find students trying to cite YouTube as often, but I also don't find it quite as problematic. Because you can see the author of each video, it's clear to students that they're not looking at an authoritative source, but rather an individual's opinion. The biggest dangers YouTube presents are the truly horrible comments, and the linked videos that will autoplay at the end, making it possible for students to get a) very distracted and b) exposed to inappropriate material. (I have had so many students tell me about incredibly unsafe experiments they see on YouTube, and want to recreate them in class.)

I make use of YouTube fairly often in class, because there really are some wonderful, accurate and informational channels, and I feel confident in my own ability to choose good videos. I do sometimes use Wikipedia to answer questions that arise due to curiosity in my daily life, but never for reasons related to my teaching. I just don't find the information to be complete enough or in depth enough to answer the questions I generally have.