1. When watching video, don't open other programs at the same time, and don't do other things while watching video, such as watching web pages, chatting on QQ, downloading things, etc.
2, a website watching video is not easy to use, try another website (if you watch video with software, some software itself is not very easy to use, just change it).
3. The antivirus software opened on the computer should be monitored less. If the memory is not too large, add a memory stick.
4. If the browser doesn't work well, change it, such as using a browser with a non-IE kernel.
5. Download the latest version of the FLASH plug-in again.
6, download Google and other browsers to try, these are not using IE as the kernel.
7. Test whether the temperature of CPU and graphics card is too high. Clean it if it is high, and replace it if it is broken.
8. If it is a system problem, restore the system or reinstall it, sometimes it is caused by improper graphics driver.
If you have any questions, please feel free to ask me.