The data science online training will have live sessions and not pre-recorded videos. It is similar to classroom training, and you can get the comfortable zone of your home. If you missed any class and did not understand any concept, you can go through the classes again. If you learn a data science online course, it is possible to do that. They will share the recordings of all the classes with every student. So there is no incontinence of long distances commuting and disrupting your schedule.