YouTube launched Tuesday a new game wherein viewers and visitors can vote to pick which of two video clips pitted against each other weekly is more impressive, funnier, cuter or weirder.

Called Slam, the game was created in collaboration with Google Research to continue promoting the most popular online video site to visitors through interaction amidst rising competition from music video website Vevo and Facebook.

Slam will initially have five categories namely comedy, cute, music, bizarre and dance. The top choices based on votes will be placed in a leaderboard while voters will earn "predictive power" points if their choice correctly becomes the crowd favourite.

According to Comscore, YouTube remains the top Internet video site with 88 billion clips viewed in October. The rate means two of every five videos viewed online is done in YouTube, which is owned by Google Inc.

The video site Youku of China is at far second place with 4.6 billion views followed by Vevo with 3.7 billion views and Facebook with 2.6 billion views.