Besides the adobe defualt "referrer", we've set up an dimension to record any page refer to the landing page at hit level, internal domain is also included. Try to help us to see any "previous page" before the current one.
But, recently we noticed that on this Referrer URL (prop33), some comes from www.youtube.com , some from exact video, e.g. https://www.youtube.com/watch?v=o-HzF8DC2Mc (fake URL just for sample).
But in fact, it's nealy impossible the traffic from www.youtube.com directly, which represents the homepage of it.
Do you have any idea why this happens and any setting maybe wrong?