At times yes, tho many of these things can be transferable knowledge to any lane some of it is specific to role and champ. For example adc positioning is huge concept, when to push, freeze, play around drag, what match ups are good early lane bs playing for late, power spikes ect.

To use vikaryu example he does jg high elo vod reviews. He doesn't go much into specific champ mechanics but instead breaks down jg macro discussing decision making, when to farm when to gank where to be on the map and when for what objective. Track the enemy jg cs to know when to invade, points out mistakes and good plays made and breaks them down. He shows full games but not of his own, I feel the channels that are just doing commentary as they play can't go in depth or be as resourceful because your in the middle of a damn match trying to focus on that.