The screen size thing can be annoying.....there are some fixes/remedies out there though.
In regards to your film editing. I haven't even really bothered on the 10v.....doesn't seem like a good fit for that type of work. I would think the performance on the Mini 10v would be affected big time.....maybe not so so much with iMovie but Final Cut Pro probably.
Good thought though....I might check it out. I've got it on my desktop and just didn't even think about putting it on this little thing.