Some guys, can convert the mp3 or wav file to dem
I still haven't figured it how, but it really exist
Should ask around, maybe at the end of the day i will give the software
highly unlikely this is true
Game replay file created by various first-person shooter games and most popularly by Counter-Strike (supported by Valve's Source game engine); saves a video recording from one player's perspective in a single or multiplayer game; used for sharing replays with others.
To play a Counter-Strike DEM file in Windows, first place it in the cstrike\\\\ installation directory. Next, start Counter-Strike and open the console window. From the console window, type viewdemo demoname, where "demoname" is the filename without the ".dem" extension.
DEM files are also used by Hexen II, Quake, and Unreal Tournament. However, the files are only playable on the game for which the demo was created.
NOTE: DEM files created by Source engine games, such as Counter-Strike, can be opened in VirtualDub to play
so they basicly cant edit the .dem file, it only opens in counterstrike because no other software or game supports this compression that HL1 is using. if they convert a gameplay from .AVI to .DEM it wont open in CS because a DEMO file includes all kind of information as map information, players in the server, even pings and FPS at that time.
try to open a .dem file with SK player or whatever, you will see the score of all players currently on that server and their ping in the .dem information note.
so tell me again? how to write this specifiic information in a .AVI? oh wait it cant!

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dont bullshit me replica, "its possible to change MP3 to DEM" OFC it is, i just change .mp3 to .dem and i have a .dem file. but there is NO way it will play on ANY Counterstrike .dem player.
this plugin is 100% secure to use, i've installed this plugin on ewar back in the day and it works PERFECTLY. helps alot with unban requests!
install this on DD2 and test it for a week! if someone gets banned ask for their .dem file! (after the admin provided his)you can also change the filenames so if he joins deathmatch instead of DD2 it wont overwrite it! and if it did somehow overwrite it then you know he banevaded (if you put the cvars correctly!)