Sans' canon voice is patrick. Now, before yall say 'NO!!!',let me explain. Sans' voice is a spongebob clip of patrick speaking (specifically the word 'maybe' clipped)
To fit the lyrics, i feel like this is actually a pacifist sans, that remembered a genocide route while frisk enters the corridor, where he's torn between sparing and killing the human Im probably over analyzing this though.
The details in 2:48 background is insane You can only see napstablook because you weren't able to kill him, and because this is a genocide route no one was in the back to cheer except an unkillable ghost. (asgore is probably waiting as usual with flowey planning stuff)
