If you are into watching programming videos, I would recommend Siraj Raval Youtube channel - https://www.youtube.com/channel/UCWN3xxRkmTPmbKwht9FuE5A It is quirky, funny and above all very short and crisp and gives you a quick overview of things. Most of his videos are related to AI/ML.
But I wouldn't recommend him as a good resource to learn core ML from or figure out how stuff work internally.