Is teaching on YouTube for non-teachers illegal? I'm planning to start a YouTube channel to help non-Italian speakers learn how to speak Italian. I was wondering if it may be illegal to do so, given I'm not a qualified teacher. Can anybody help? :)
Youtube is not a teaching platform, although it is used for such a purpose. People are uploading everything on youtube and they are allowed to do so as long as the content of their videos is legal. 

What I mean by legal here, is that the video should fulfil the conditions set by youtube, namely, copyright and Rules of the community. 

Otherwise, the content is evaluated by youtube users, whatever its nature. Overall, I would say YES, anyone is allowed to upload his own video to youtube from the legal point of view. However, he should care about giving correct information (especially if it is considered as a teaching video) from the ethical point of view.