Hi, they may not belong to the same category. For example, you are searching the keyword "website health checker", then you'll get a list out, right?
So i am just wondering what are the main factors affecting the result ranking? By searching and reading some online materials, it is said that Youtube changed its ranking agorithm till 2012 Aug. They have changed to more focusd on video watch time length than simply click rate.
And i do not think this is the only factor, however, i am not sure what are the other factors. Any ideas?