Learn how to train and fine-tune Transformer models using the Trainer API in this informative 27-minute video. Explore key concepts including tokenizing data, class balance, and the training process. Gain insights from Lewis, a machine learning engineer at Hugging Face and co-author of an upcoming O'Reilly book on Transformers, as he shares his expertise in developing open-source tools for natural language processing. Follow along with the step-by-step explanation and discover valuable NLP tips and tricks to enhance your machine learning skills.