How can I watch YouTube videos offline on PC?

Related questions

1. Is mp4 audio better than mp3?
2. Why is mp4 the best?
3. Can we save YouTube videos offline in laptop?
4. Does mp4 have audio?
5. Is mp4 video or audio?
6. Are MOV files bigger than mp4?
7. Which is better mp4 or MOV?
8. Why mp4 is the best?
9. What program can I use to play mp4 videos?
10. What are the disadvantages of mp4?

Tags

1. #youtube
2. #below
3. #context
4. #download
5. #first
6. #visit
7. #tablet
8. #smartphone
9. #option
10. #click
11. #offline
12. #android
13. #video
14. #alternatively
15. #available
16. #button
17. #select