Modify print.css to print single column "mobile" view

Hello,
Is there an easy way to modify the print.css file to force it to print a single column view (like a mobile view) of the website? Currently, it prints the two-column view, which doesn’t look great.
Also, is there a way to force it to not print the videos? I tried this code, but it didn’t work, so assume my code is wrong :-)

/* Remove Videos*/
.avia-video .avia-video-16-9{
  display: none;
}