If not, you need to use third-party software to help realize it. Here, take the APP "screen recording master" as an example, and the usage method is as follows:
1. Search for "screen recording master" in the application market, download and install it.
2. Open after installation, and open all kinds of mobile phone permissions according to the prompts. When you return to the mobile phone desktop, you will see the desktop operation buttons of the software. The first button is the record button;
3. Then open the video you want to record. Take Youku Video as an example, you can see that the record button is still at the top of the screen.
4. Click the record button to start recording, and click "Start Now" in the pop-up confirmation window;
5. After recording, drop down the menu bar and click "Stop" to stop recording;
6. Pull down the menu bar again and click the yellow box in the figure to view the video just recorded.