How does cs record demo? And how to turn demo into video upload?

When watching the demonstration, use Fraps to record it, and then use transcoding software to convert it into a smaller format, and you can upload it. This work suggests running it on a larger hard disk. The original video recorded by Fraps is very large. I recorded it myself once, and the video exceeded 1G in a few minutes.

The way you said to use pictures is more troublesome, requiring a lot of software and complicated steps. With my method, only two softwares are needed at most.