Can viral pneumonia kill you?

Sometimes. Most cases of viral pneumonia are relatively mild and resolve spontaneously. There are exceptions. Influenza pneumonia can cause a severe life threatening pneumonia even in otherwise healthy people. In patients whose immune system is compromised a more severe viral pneumonia can occur. This might be seen in those with hiv, after and organ transplant or after cancer chemotherapy.
Yes. Good examples are severe RSV (respiratory syncyctial virus) and varicella (causative organism for chicken pox) pneumonia that lead to respiratory failure and fatality.