YouTube’s new Brand Pulse Report seems like it could be really useful.

evaluate your brand presence across YouTube by detecting brand mentions via visuals (brand logos, product shots, etc.) and language (audio, video titles, etc.). So, if a creator uses or mentions your product in passing, we recognize it and capture it.

incorporating metrics that demonstrate how your paid ads on YouTube can lead to more views on organic videos — a previously underreported value for paid media — and how users seeing both your paid and organic videos together leads to searches for your brand.