If possible, can functionality to 'follow' certain users be added similar to how the now defunct YouTube channel worked?
Already there. That was the last piece I did this morning before releasing it.
This looks excellent. Also, although this might be better suited to the Dev forum, how did you do the autofill for the search?
Assume you mean populating the suggestion list on the search screen. That's really just intermediate search results for whatever you've typed so far.