youtube added to the new feature, where you can link all your youtube account to your orkut account to share your youtube activity among your friends. Your youtube activity includes favoriting, rating, or uploading a video.
You can select what activity would you like to share with your orkut, twitter or facebook friends. Follow the procedure to know how to do this.
1. Go to youtube.com and login to your youtube account
2. Go to Settings >> Activity Sharing as shown in the image below.
3. Now click Connect accounts link for those account you would like your youtube activity to be shared with your friends which will include uploading a video, commenting, liking a video, favorite a video and subscribe to channel etc.