Question about Panasonic Tx-40esw404

Unfortunately, I don't know if it is pre-installed. It does support it in any case. You may have to download it from the Appstore first. Normally, Youtube, Netflix and other popular apps are installed when the TV is set up, depending on the country selection.

Quote from the description:

Internet apps
Use a wide variety of apps on the big TV screen
TV streaming is becoming more and more popular. Providers such as Amazon, Netflix or YouTube are continuously increasing their programme. With the Panasonic TV, you can join in the excitement at the touch of a button. The web browser also allows you to surf the Internet.