HDCP protections added to Chrome in 3...2...
edit: I only meant this in so much that it's entirely possible for Google, that controls both Chrome (the biggest browser) and YouTube (biggest online video site) to encable DHCP restrictions on video capture from within the browser for sites (such as YouTube) that might implement it. Given their proclivity towards giving the RIAA/MPAA whatever they ask for, it wouldn't surprise me.