My solution to totem issues is to deinstall it and definitely don't use it's plugins. It always crashes somehow...

At least on Fedora12, the gecko-mediaplayer is a more modern player-plugin for gnome. I use
"gecko-mediaplayer-0.9.8-2.fc12.x86_64 : Gnome MPlayer browser plugin."  ALso gxine-mozplugin-0.5.903-4.fc12.x86_64.

Both work well with google-chrome-beta-5.0.375.29-46008.x86_64 and netscape. I use chrome.

Due to their better integration with ALSA (I can explicitly set toslink digital out instead of using generic
/system/gstreamer/0.10/default/audiosink like gecko mediaplayer), my current favorites are the Qt-based smplayer ( smplayer-0.6.8-1.fc12.x86_64 ) andf the kde-based kmplayer ( kmplayer-0.11.2a-1.fc12.x86_64 ).

All seem to play the LAC 2010 videos well.

The easiest way to see these videos would be using a flash player like JWPlayer (e.g. http://nielsmayer.com/xwiki/bin/view/Macros/JWPlayerJSPL_Test ). Unfortunately, most flash media players don't support OGG/OGV, perhaps because underlying flash doesn't support the formats -- my jwplayer example above only supports '.mp3' '.aac' '.m4v', '.mp4' and '.flv' [[ http://en.wikipedia.org/wiki/Flash_Video#Format_details ]]. Foiled by media formats again...just when I was thinking it would be useful to put these videos on http://trainspodder.com (under construction) as a good streaming-annotation test case as I've mostly been concentrating on music: http://nielsmayer.com/ts-episode-timeline.png   http://nielsmayer.com/ts-episode-evnt-anls.png ... 

Niels
http://nielsmayer.com