Remember seeing an old video I giggled at, and wanted to try and recreate it

https://youtu.be/ucxR0Z1ZEis?si=ES4BaqHcF_4EuZsJ (volume warning, big time)

I follow a lot of memes and such online, and I’ve recently stumbled across some videos of people using ai voice changers to sound like characters, i.e. the payday 2 cloaker I linked above.

I’ve seen more videos of people using voice changers to sound like the mercs in team fortress 2, and I wanted to try this myself for my and other peoples amusement, maybe some screwing around in SCP:SL

Does anyone know the programs they used? Or the process it takes to do this? It sounds fun and hilarious to me