If you can get your hands on an older video card for free then use that. But otherwise it is not worth getting a video card for just general web/office computer use. Even a $25 Rasberry Pi
computer can handle 1080p video output over HDMI.
For my parents I just put my outdated nVidia 7600 video card in their desktop since I did not need it anymore. Even today that video card would still be good enough for what they do and get video processing off of the CPU and system memory.