You are almost there:

Instead of `mv video.mp4 VIDFOLDER` you need to `mv video.mp4 $VIDFOLDER`.  The `$` is needed to use the variable.  It must NOT be used during assignement of the variable.

And the `VIDFOLDER=/path/to/my/folder` should go into your `.bashrc`-file.

As an alternative, you could set up function for that (in `.bashrc` or `.bash_aliases`):

```lang-bash
vidmv () {
local video="${1?need a file, please!}" VIDFOLDER=/path/to/my/folder

if [ ! -r "$video" ] ; then
  printf '%s' "Can't read file \"$video\""
fi

mv "$video" "$VIDFOLDER"

}
```

and call that with `vidmv somefile.mp4`