If the data is streamed as fast as the video is playing, it will stutter, stop, start, etc. 512 MB of RAM for anything but Vista shouldn't be the limiting factor for watching YouTube.. Dial-up simply isn't fast enough and for most types of streaming video, neither is the basic "half speed" DSL options that some ISP's offer, like 768 Kbps.. The best way to fix such is get a faster connection speed.
On the other hand, if you already have a quick broadband connection, you'll need to tell us more about your computer and things you've done to clean it up.. Which operating system are you using? Processor speed? Do you have up to date antivirus and antispyware programs installed and have you performed Malware scans? Removed all unnecessary startup programs and services?
Hope this helps.
When trying to watch videos on youtube, etc., the video feed stops and starts. Is this caused by too little RAM (512)? Or is the video play speed just faster than the download speed? I don't understand much about this stuff. Can someone clue me in, or offer suggestions?