Well since Chromium OS (or when preinstalled on Chromebooks, Chrome
OS) isn't exactly designed for other hardware than what Google's
Chromebook manufacturers make, it doesn't need to have an easy
installer.
When it is preloaded onto a Chromebook, you don't install it. Instead,
it just loads and you're ready to go.
You could install Ubuntu onto a Chromebook.
About $300 is a good deal for that type of a netbook because it has a
bigger screen and it one of the fastest netbooks out there. Ubuntu may
be better for you, but if someone only wants a computer to be on
facebook or twitter in less than 30 seconds, then Chrome OS (or
Chromium OS) would be a better choice.
Google has set the standards so people don't buy Chromebooks that are
as slow as their old Windows computer. Or even sower.
System76 (a manufacturer of computers with Ubuntu preinstalled)
discontinued their netbooks because of not being up to their
standards.
the SSD is a 16 GB one and it is very fast. To get 16 GB SSDs, I think
they cost around $50. And maybe up to $100 depending on which one you
would get.
I think there is a good chance that higher quality videos could play
than those that could play on Windows netbooks (there is a bigger
screen and the Chromebook is faster). Netbooks in general have very
underpowered graphics cards, so most of the time they are at 1024x600,
which is not enough to run some applications.