I saw a YouTube video where a guy was showing off his hacked 3DS and a had a PS1 virtual console in his library, was that fake or is it actually possible to have custom virtual consoles with Homebrew?

Just use a 128gb sd card,i do myself, Then use retroarch pcsx rearmed,, you can use ps1 forwarder but i had sound issues with it personally. you probley know this but use chdman for chds, (ps1 bin & cure) or psx2psp. ps1 is much better than it used to be. These setting worked bestI saw a YouTube video where a guy was showing off his hacked 3DS and a had a PS1 virtual console in his library, was that fake or is it actually possible to have custom virtual consoles with Homebrew?