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.