While as a whole this Youtube channel is not for entertainment, and is fully about education and do in fact require you to seek out professional help if you a struggling with things.
I personally feel it's helpful for me who is just looking for some comfort and help to ease my stress levels and to find some understanding.
I feel like there is a great need for stuff like this on the internet which is more dedicated to helping people and to showcasing common signs that can help others who simply are in the process of feeling stressed or dealing with anxiety or depression and other forms of sadness.
By all means please don't take everything this youtube channel says as gospel or scientific facts of everything. But know that it is trying to help you deal with everyday challenges and making you know that deserve to find happiness.