Hmmm this might be cut up and pasted together as to function as an ad at least.

nerd2ninja

Not really an advertisement but if you also mean "best bitcoin introduction", then this is my favorite so far:

I actually couldn't find it for a second and was worried it was taken down.

Started downloading it when I found it, haha

bitcoin

Ask SN: Best Bitcoin Advertisement?

Not really an advertisement but if you also mean "best bitcoin introduction", then this is my favorite so far:
[How Bitcoin works & why it has value](https://www.youtube.com/watch?v=ZKwqNgG-Sv4)

I actually couldn't find it for a second and was worried it was taken down.
Started downloading it when I found it, haha