Yes, Pinterest does work well for YouTube marketing. Keep in mind Pinterests audience is largely female, so choose your niches with that in mind. Male niches do still work, but I find keeping to stereotypically female niches is easier.
There are 2 ways to get your videos on Pinterest:
1. Directly...by submitting your video to Pinterest, it will be a video pin.
2. Indirectly, by making your target link = the video on your channel in YouTube. But you need to upload an image, otherwise Pinterest will turn it into a video pin (as above).
I do both, but prefer the indirect method (because it seems to encourage people to leave Pinterest better than using a link to your website does).