Okay, you've gotten far enough to successfully give your Quest permission to connect. Once you've done that, put the Quest down and leave it connected.
At that point, you should be able to access the Quest on your laptop from This PC -> Quest 2 -> Internal Shared Storage
In there should be a series of folders like Music, Movies, DCIM, Downloads. You should then be able to drag and drop the movie from your laptop to the Download folder from there.