A TV doesn't have a "video card" in the same sense that a PC/laptop do.
When you connect a computer to a TV, it is in essence being used as a monitor only. The graphics card in the computer will determine, along with supported resolution modes of the monitor (TV), what resolution and frame rate along with quality.
Since you have a smart TV there are apps and such where you can host your video in a program or app that the TV itself would run in order to process and watch. Plex, for instance. In some cases you can even put the video file on a USB stick and the TV has the capability to watch it, according to format.