Can I download movies on my acer mini notebook watch with no wifi

Without wifi your going to need some sort of internet access to download anything, check the sides for an Ethernet port, plug it in, do your business.
after you have it downloaded however, you dont need any internet at all to actually watch a movie. unless its streaming =)
hope that helps.

Wi Fi is just one option relating to internet connections. It really has no bearing on whether you can watch a given movie or not. Viewing videos is dependent on the processor speed, amount of available ram and quality of the video card. In the case of a lap top that is usually an on-board item.
There are several other types of internet connections and really depend on what connection options that are available on your lap top. DSL cable modem with an Either net plug. Even if your mini is limited to a WLAN Wi-Fi connection you can still load movie up via the dvd drive. Although this will entail you to acquire the video from another source like a second computer with a hard line connection.

Download like in what, exactly? Downloading at home and watching on the road, or downloading on the road, which NEEDS WiFi?
As far as I know you'll need WiFi at some point.