Yep, and that's quite dangerous. Especially since you can see often fake videos circulate around, that tell you to download a special software or codec to play

Yep, and that's quite dangerous. Especially since you can see often fake videos circulate around, that tell you to download a special software or codec to play them (with malware, of course). WMP also had a scripting/runtime system that could be abused greatly. Be careful what you download :)