YouTube is giving creators more ways to test, optimise and expand their videos, from dynamic thumbnails and video A/B testing to live auto-dubbing. YouTube is rolling out a new wave of creator tools that could change how artists approach video promotion on the platform. Announced at Made on YouTube on the 23rd of September, the updates include AI-powered feedback in YouTube Studio, dynamic thumbnails, video A/B testing, live auto-dubbing and new ways for creators to collaborate. For musicians already using YouTube to promote releases, connect with fans or build an audience, there are several updates worth paying attention to. YouTube…