I'm going to point out what no one else has.
If you are not willing to pay more than $1,000, there is no combination of computer and video editor you can buy that is going to improve your videos (unless your computer is 10 years old and needs to be updated anyway, in which case any new computer with windows movie maker should do the job). And even if you spent that $1,000, the improvement would not be worth the money.
If you truly want to make videos that people want to watch, then save your money. Get lessons on how to use high-end video editors and get the equipment you need. Then go and have fun with your new hobby.
However, the first line of your original post tells me that your computer is old and simply needs to be updated.
In my opinion, even better than the Acer is
this laptop. It's also got a better processor (3.4 GHz) than what Echoez was showing you. For the sake of videos it's better. The specs are otherwise pretty close, and this one is cheaper at $440. As Echoez says you can easily and cheaply upgrade the ram. I'm assuming that you're not going to make 10 full length movies so the hard drive should be more than enough.