There is an 8-bit / chip-tune music at the end of this video (at the timestamp 08:20):
I thought this music was copy protected or is not royalty-free, so I asked the video owner about the track in the comments and I was ignored.
After a few months, my kid was playing a game on his iPad when an ad popped up and that ad had the same music as the background music...
I used shazam and AHA chrome extension to identify the music, but none of that worked. If the music is not royalty-free, I am willing to buy it. If not, where can I listen to the full track?