Depends on what sort of laptop you have.
4K replay takes a lot of grunt to replay and most laptops do not have the horse power.
For a TV, it needs to actually be a 4K or UHD TV. To feed a 4K (4 times HD) signal to a 4K TV you generally need a HDMI type 2 connection - input. The hdmi type 2 connection is a newer standard and most TVs a year or so old do not have one.
Otherwise you need to render the 4K capture out to a more friendly and less processor intensive codec or format. Run the 4K through video editing software and downscale to HD (1080P).