The best alternatives to KarmaCircles are Advice.vc, Mybridge, and Startup Fucking Advice. If these 3 options don't work for you, we've listed a few more alternatives below.
Stritch video format enables you to interact with video by slides video contains because all materials provided in videos exist independently from video itself. Search and organize information by slides, not by title, links or timecode. ConteXt is king.