Some popular digital marketing YouTube channels include:

1. Neil Patel Digital: Offers tips and strategies for SEO, PPC, content marketing, and more.
2. Gary Vaynerchuk: Known for his motivational videos and insights on entrepreneurship, social media, and digital marketing.
3. Brian Dean (Backlinko): Focuses on SEO, link building, and content marketing.
4. Hootsuite: Provides social media marketing tips and best practices for businesses.
5. Social Media Examiner: Features tutorials and case studies on social media marketing for businesses.
6. HubSpot: Offers a variety of digital marketing and sales tips, including inbound marketing, email marketing, and CRM.
7. Copyblogger: Offers tips and strategies for content marketing, copywriting, and content creation.
8. DigitalMarketer: Offers a wide range of digital marketing training and resources, including email marketing, paid advertising, and analytics.
9. The Marketing School: Provides daily, bite-sized marketing tips and strategies.

10. Smart Insights: Offers digital marketing strategy and planning resources and templates.