Moderation is very complicated especially since it can be subjective based on the background and skill level of who is watching the video. Would it be possible to crowd source this? For example, I could add a filter to my search saying exclude 'profanity' and videos with profanity would be removed. Or exclude videos that are 'dangerous' or 'for entertainment only' and those would be removed. My thought is that we should use the shear numbers of persons watching the videos to our advantage. Honestly, I sort of do this by looking at the comments since many times you can gather the flavor of the video based on the comments. This could also be used to political bias. Videos with a right-wing leaning would get tagged as leaning right and vice-versa. Also, content creators would be incentivized to accurately tag their videos and perhaps the algorithm could penalize content creators with discrepant self-tag versus what viewers tag as.