To disprove Labor theory of value you could simply go onto YouTube and see that some of the most popular and well payed videos are simply toy unboxing videos or unscripted vlogs that have had little to no thought put into them. Then if you look at videos from commentators that work on researching their subjects for days (sometimes weeks) and take around a week to shoot and edit the video. They usually have a small fraction of the views that these less thought provoking channels have. More labor did not create more value.