There are many online platforms where you can watch videos that explain the concept of NLP. Here are some popular options:

YouTube: YouTube is a great source for educational videos on NLP. You can search for channels that specialize in NLP or AI, such as "AI Engineering" or "Machine Learning Mastery". You can also search for specific topics within NLP, such as "sentiment analysis" or "text classification".

Coursera: Coursera is an online learning platform that offers courses on a wide range of topics, including NLP. Some popular NLP courses on Coursera include "Natural Language Processing" by deeplearning.ai and "Applied Text Mining in Python" by University of Michigan.

edX: edX is another online learning platform that offers NLP courses, including "Natural Language Processing with Python" by IBM and "Introduction to Natural Language Processing" by University of California, Berkeley.

Udemy: Udemy is an online marketplace for courses on various topics, including NLP. You can search for courses on NLP, such as "NLP - Natural Language Processing with Python" or "Text Mining and NLP Fundamentals using Python".

Stanford NLP Group: The Stanford Natural Language Processing Group provides free online resources, including lecture videos, on various NLP topics. You can access these resources on their website: https://nlp.stanford.edu/resources/.

I hope this helps!