On a video web site like ted.com, Chinese characters are not displayed properly. Instead, you may see white rectangles (aka "Mahjong tiles").
E.g. bug report for the chromium browser:
The subtitiles of the Ted website video are filled with tofu.
https://bugs.chromium.org/p/chromium/issues/detail?id=542516
Mplayer and VLC problems with unicode Chinese subtitles
https://bugs.launchpad.net/ubuntu/+source/mplayer/+bug/589576
