Use videos to teach skills you lack. Some terrific instructional videos are available without the fast pace and flashing lights typical of Sesame Street. If you own the video, you can watch it as many times needed. We are currently studying French with French in Action. It was less expensive to get the French videos than hire a tutor, and the videos may be purchased one at a time.
Books do the job faster.
Since talking is slower than reading, books are a faster and more comprehensive source of information than videos. One good historical novel can be read faster than a 10-part documentary and connects better with the thinking language process. A single video may be sufficient for visual information about that subject. Choose the most economical media for the subject. A video is slower and more expensive than a book, but cheaper than most classes and much cheaper than a trip to Europe.