You are aware there is a very big difference between digital media, and seeing someone live?
Even a very good deep fake, when done live will show issues. It takes quite a bit of data to get this to work well.
Biden today, is the same Biden from 10/20 years ago. Wrinkle mapping proves this.
that said, yes you could offline render Biden onto another actor and have them look the same. You can then render the voice to sound like Biden. 3 issues.
1 the video is detectable as being a deep fake.
2 the voice will not be the same. Forensic voice analysis can detect actors and machines versus real and actual persons.
that said, yes you could offline render Biden onto another actor and have them look the same. You can then render the voice to sound like Biden. 3 issues.