add image. I Tube, You Tube, Everybody Tubes … Pablo Rodriguez Telefonica Research Barcelona. YouTube Video Example. “ Content is NOT king ” . Content Explosion. Internet. infinite. How to search content?. Number of TV channels. digital cable. 100. analog cable. 40. broadcast. 3.
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How to search content?
Number of TV channels
Infinite Choice = Overwhelming Confusion
Filters required to
connect users with
appeal to their
“bite-size bits for high-speed munching”
[Wired mag. Mar 2007]
15 days in YouTube to produce 120-yr worth of movies in IMDb!
1000 uploads over few years vs. 100 movies over 50 years
30 sec–5 min vs. 100 min movies in LoveFilm
the rest: consumption patterns
metadata: video ID, length, views
1.6M Entertainment, 250KScience videos
Static popularity characteristics
Other online VoD systems show smaller skew!
Fraction of aggregate views
Normalized video ranking
If video has K views, then users will watch the video with rate K
City population (log)
Zipf + exp cutoff
Zipf is scale-free, while exponential is scaled : underlying mechanism is Zipfand truncation is due to bottlenecks
Zipf + exp cutoff
Latent demand for products that is suppressed by bottlenecks in the system
[Chris Anderson, The Long Tail]
40% additional views!
How? Personalized recommendation
Enriched metadataAbundant videos
Relationship between popularity and age
User preference relatively insensitive to age
--> 80% requests on videos older than a month
The probability of a video being watched is 43%, 18%, 17% and 14% for the first 24 hours, 6 days, 3 weeks, and 1 month accordingly
Level of duplication
Birth of duplicates