If it was the Sylvania netbook, there was a software fix for WiFi, which was mentioned here:
http://www.hpcfactor.com/forums/forums/thread-view.asp?tid=16962
Theoretically, this patch could work with any WM8505 netbook.
As I recall, the YouTube app searches for mobile versions of videos, and some folks here have said that those versions are no longer available through YouTube. The workaround is to download the video on your PC and use DVD Catalyst to convert it to a viewable format for the netbook:
http://www.tools4movies.com/
People who buy these should understand that they are not a substitute for notebooks with desktop versions of Windows. They are intended for use as lighter-duty mobile devices, particularly regarding Web browsing. But you'd be surprised what you can do with them if you do some homework and search for ARM-based software. Even the Web browsing experience can be improved by using alternative mobile browsers, in particular Webkit-based ones like Opera Mini. But this does require a person with a little patience who is willing to tinker a little.