After some digging, I found the crash problem: the browser was using the "temp" folder but there wasn't enough space. Vimeo indicated they are looking at adding an option to allow end users to clear disconnected session; though, at the moment it can only be done by customer service. An additional item, not a problem, just odd - when viewing the videos, the 4 core processor uses about 65% ~ 85% of it's capacity even though the video hardware and drivers are up-to-date. It seems to be dropping video frames to keep the streams synchronized. When viewing other video sources in 1920*1080 in MP4 format, the CPU run at 13%. Netflix peaks at 22%. Internet speed tests show a regular 28~29 Mbps. Logging out of the session rather than just closing the browser has helped too.