The same for me. I can search videos but when I want to open it from the thumbnail, it fails. Opening a video from URL works fine. I have the RTSP plugin for GStreamer 0.10.0 installed.
totem --debug (totem:10443): GLib-GObject-CRITICAL **: Read/writable property 'object' on class 'ZeitgeistDpPlugin' has type 'TotemObject' which is not exactly equal to the type 'GObject' of the property on the interface 'PeasActivatable' libgdata-Message: Unhandled XML in GDataAuthor: <yt:userId>Gt7X90Au6BV8rf49BiM6Dg</yt:userId> libgdata-Message: Unhandled XML in GDataYouTubeVideo: <yt:hd/> libgdata-Message: Unhandled XML in GDataYouTubeGroup: <media:license type="text/html" href="http://www.youtube.com/t/terms ">youtube</media:license> libgdata-Message: Unhandled XML in GDataYouTubeGroup: <yt:uploaderId>Gt7X90Au6BV8rf49BiM6Dg</yt:uploaderId> libgdata-Message: Unhandled XML in GDataYouTubeVideo: <yt:rating numDislikes="2599" numLikes="50685"/> libgdata-Message: Unhandled XML in GDataAuthor: <yt:userId>DvpvEoCO5TNqD6ILEtlDmQ</yt:userId> libgdata-Message: Unhandled XML in GDataYouTubeVideo: <yt:hd/> libgdata-Message: Unhandled XML in GDataYouTubeGroup: <media:license type="text/html" href="http://www.youtube.com/t/terms ">youtube</media:license> libgdata-Message: Unhandled XML in GDataYouTubeGroup: <yt:uploaderId>DvpvEoCO5TNqD6ILEtlDmQ</yt:uploaderId> libgdata-Message: Unhandled XML in GDataYouTubeVideo: <yt:rating numDislikes="4943" numLikes="195645"/> libgdata-Message: Unhandled XML in GDataAuthor: <yt:userId>UQYeJ6D3qDlQkMboh-8-xw</yt:userId> libgdata-Message: Unhandled XML in GDataYouTubeGroup: <media:license type="text/html" href="http://www.youtube.com/t/terms ">youtube</media:license> libgdata-Message: Unhandled XML in GDataYouTubeGroup: <yt:uploaderId>UQYeJ6D3qDlQkMboh-8-xw</yt:uploaderId> libgdata-Message: Unhandled XML in GDataYouTubeVideo: <yt:rating numDislikes="3856" numLikes="30021"/> libgdata-Message: Unhandled XML in GDataAuthor: <yt:userId>zNAswnSN0rZy79clU-DRPg</yt:userId> libgdata-Message: Unhandled XML in GDataYouTubeVideo: <yt:hd/> libgdata-Message: Unhandled XML in GDataYouTubeGroup: <media:license type="text/html" href="http://www.youtube.com/t/terms ">youtube</media:license> libgdata-Message: Unhandled XML in GDataYouTubeGroup: <yt:uploaderId>zNAswnSN0rZy79clU-DRPg</yt:uploaderId> libgdata-Message: Unhandled XML in GDataYouTubeVideo: <yt:rating numDislikes="546" numLikes="12797"/> libgdata-Message: Unhandled XML in GDataAuthor: <yt:userId>Hw4KxAMS3J8-8_LU0q3jRg</yt:userId> libgdata-Message: Unhandled XML in GDataYouTubeGroup: <media:license type="text/html" href="http://www.youtube.com/t/terms ">youtube</media:license> libgdata-Message: Unhandled XML in GDataYouTubeGroup: <yt:uploaderId>Hw4KxAMS3J8-8_LU0q3jRg</yt:uploaderId> libgdata-Message: Unhandled XML in GDataYouTubeVideo: <yt:rating numDislikes="47" numLikes="1536"/> libgdata-Message: Unhandled XML in GDataAuthor: <yt:userId>1qOCLTkxjoNo1zbcFCPG7g</yt:userId> libgdata-Message: Unhandled XML in GDataYouTubeGroup: <media:license type="text/html" href="http://www.youtube.com/t/terms ">youtube</media:license> libgdata-Message: Unhandled XML in GDataYouTubeGroup: <yt:uploaderId>1qOCLTkxjoNo1zbcFCPG7g</yt:uploaderId> libgdata-Message: Unhandled XML in GDataYouTubeVideo: <yt:rating numDislikes="34" numLikes="450"/> libgdata-Message: Unhandled XML in GDataAuthor: <yt:userId>BLUOST1WnJ2Yqh3PNYG-fQ</yt:userId> libgdata-Message: Unhandled XML in GDataYouTubeGroup: <media:license type="text/html" href="http://www.youtube.com/t/terms ">youtube</media:license> libgdata-Message: Unhandled XML in GDataYouTubeGroup: <yt:uploaderId>BLUOST1WnJ2Yqh3PNYG-fQ</yt:uploaderId> libgdata-Message: Unhandled XML in GDataYouTubeVideo: <yt:rating numDislikes="135" numLikes="5931"/> libgdata-Message: Unhandled XML in GDataAuthor: <yt:userId>mQXOAse-VnzuXHebX5I77g</yt:userId> libgdata-Message: Unhandled XML in GDataYouTubeGroup: <media:license type="text/html" href="http://www.youtube.com/t/terms ">youtube</media:license> libgdata-Message: Unhandled XML in GDataYouTubeGroup: <yt:uploaderId>mQXOAse-VnzuXHebX5I77g</yt:uploaderId> libgdata-Message: Unhandled XML in GDataYouTubeVideo: <yt:rating numDislikes="495" numLikes="14075"/> libgdata-Message: Unhandled XML in GDataAuthor: <yt:userId>pDJl2EmP7Oh90Vylx0dZtA</yt:userId> libgdata-Message: Unhandled XML in GDataYouTubeVideo: <yt:hd/> libgdata-Message: Unhandled XML in GDataYouTubeGroup: <media:license type="text/html" href="http://www.youtube.com/t/terms ">youtube</media:license> libgdata-Message: Unhandled XML in GDataYouTubeGroup: <yt:uploaderId>pDJl2EmP7Oh90Vylx0dZtA</yt:uploaderId> libgdata-Message: Unhandled XML in GDataYouTubeVideo: <yt:rating numDislikes="249" numLikes="5396"/> libgdata-Message: Unhandled XML in GDataAuthor: <yt:userId>b8W-csSQgpMyEIopmg9ncw</yt:userId> libgdata-Message: Unhandled XML in GDataYouTubeGroup: <media:license type="text/html" href="http://www.youtube.com/t/terms ">youtube</media:license> libgdata-Message: Unhandled XML in GDataYouTubeGroup: <yt:uploaderId>b8W-csSQgpMyEIopmg9ncw</yt:uploaderId> libgdata-Message: Unhandled XML in GDataYouTubeVideo: <yt:rating numDislikes="70" numLikes="1943"/> (totem:10443): Totem-WARNING **: Couldn't find a playback URI for entry -OBxL8PiFc8. (totem:10443): Totem-WARNING **: Couldn't find a playback URI for entry y1FHfcaWPoM. ** Message: Error: Nebyl nalezen žádný podporovaný proud. Patrně bude nutné povolit více přenosových protokolů, jinak asi bude scházet potřebný zásuvný modul rozšíření GStreamer RTSP. gstrtspsrc.c(5387): gst_rtspsrc_setup_streams (): /GstPlayBin2:play/GstURIDecodeBin:uridecodebin0/GstRTSPSrc:source Ubuntu 12.04 LTS Kernel: 3.2.0-24-generic Version of RTSP plugin for GStreamer: libgstrtspserver-0.10-0 0.10.8-3
