Can I Play YouTube videos on my phone?

If you are asking about videos which you downloaded from official YouTube app, then it is not possible you can only play them in YouTube app of your device. Better use any other method to save videos directly to your phone memory or SD card so that later you can transfer them to Laptop or any other device.
For More Information Please Refer:
https://www.quora.com/How-do-I-transfer-YouTube-videos-that-I-have-downloaded-on-my-Android-phone-to-a-laptop
You May Also Like to Read: