It could be coincidence where the situation happening and being discussed keeps it in your consciousness and caused you to notice the advert. If the ad played

It could be coincidence where the situation happening and being discussed keeps it in your consciousness and caused you to notice the advert. If the ad played 2 months and 1 day ago would you be freaked out that YouTube predicted the future? You may have ignored it and not made a connection. Simple evidence for this - note the large % of Youtube Ads that are totally irrelevant to you.