can I use a Roku on my laptop using the HDMI port?

Solution
The HDMI port on a laptop is output only. It won't work with a ROKU. Most anything a ROKU can do, the web browser on your laptop can do. Netflix, Amazon video, etc ...


Almost certainly no.
The HDMI port is output, not input.

Presumably you tried this and it failed to work?
 
The HDMI port on a laptop is output only. It won't work with a ROKU. Most anything a ROKU can do, the web browser on your laptop can do. Netflix, Amazon video, etc ...
 
Solution
A few older Alienware laptops had HDMI ins/outs, but every other laptop I've heard of only has HDMI outputs. So no, it won't work.