As someone who works in advertising...I really would want to see the numbers on your last ad. 69k views means nothing.
What are the View-Thru-Rates?
What are your buying objectives (CPM/CPV/CPC)?
Who is your audience?
Overall, what is your goal? (measurable) A 2:00+ video likely has way less than a 1% completion rate. Is that ok? How many people get the baseline level of information? How many people actually signed up? (You can certainly track clicks, or even reach out to steem inc. or Busy to get a custom URL)
I imagine your intentions are good, and anyone can choose to support you, but I have a lot of concerns over your methods for "advertising steem".