Youtube App Add Filter Options in the search results
According to some code discovered by XDA on the most recent version of the YouTube mobile app (version 11.20.54), some of the filters used to search on the desktop version of YouTube will be coming to the mobile version of the video streamer. The strings discovered by XDA point to the ability of the mobile YouTube app user to be able to search for videos by rating, relevance and view count.
These filters have yet to show up in the mobile app. Considering that over half of all YouTube views come from a mobile device, it behooves Google to build up the mobile app as much as it can. Improving the capabilities of the mobile search tool would be a great step toward that goal.
XDA says that "it is anyone's guess" as to when, or even if, these new filters are added to the app. XDA's detective work would seem to indicate that the filters will be coming soon, so if you've been hoping for improvements to search on the YouTube mobile app, you're wish could soon be granted.
YouTube Filter Options
<string name="by_view_count_search">View count</string>
Source : xda-developers