From the wording of your post I assume you primarily speak French?<P>VCD simply stands for Video CD, and it is, well, a video for cd format. It really isn't used much, as the limited space of a CD ...

An earlier Compact Disc format for full-motion video. Introduced in 1993 and developed by Panasonic, Philips, Sony and JVC, a Video CD (VCD) held 74 minutes of VHS-quality video and CD-quality sound ...