subliminal advertising

Are youtube video creators inserting frames to "prime" people's brain with advertising material?
Our memory system can store things we don't perceive, just few ms of exposure is enough.
They could plant ideas, brands and suggestions to lots of vulnerable, easily-influenced people(e.g. children/elderly/psychotics).
has anyone analyzed a lot of videos with frame-by-frame analysis?

>>2
https://en.wikipedia.org/wiki/Subliminal_stimuli#Consumption_and_television
Karremans suggests that subliminal messages have an effect when the messages are goal-relevant.[31] Subliminally priming a brand name of a soft drink (Lipton Ice) made those who were thirsty want the Lipton Ice. However, those who were not thirsty were not influenced by the subliminal messages.[31] Karremans did a study assessing whether subliminal priming of a brand name of a drink would affect a person's choice of drink, and whether this effect is caused by the individual's feelings of being thirsty.[31] In another study, participant's ratings of thirst were higher after viewing an episode of The Simpsons that contained single frames of the word "thirsty" or of a picture of a Coca-Cola can.[32] Some studies have shown greater effects of subliminal messaging with as high as 80% of participants showing a preference for a particular rum when subliminally primed by the name placed in an ad backward.[33]