What is the best and profitable interested category to open a new YouTube channel?

 The best and most profitable categories for starting a YouTube channel are usually those with high viewer demand and opportunities for monetization. Here are a few popular and lucrative niches:

1. **Technology and Gadgets**: \

Reviewing gadgets, tutorials, and tech news often attracts a broad audience. It also has great affiliate marketing potential through product links.

2. **Personal Finance and Investing**:

 Channels that offer advice on budgeting, saving, investing, and earning money have become highly popular. They often monetize through sponsorships, affiliate marketing, and high CPM ads.

3. **Health and Fitness**: 

Providing workout routines, diet tips, or mental health advice is a category with growing demand. There’s potential for selling related products, affiliate marketing, or sponsorships.

4. **Education and Tutorials**: 

Channels that teach practical skills like programming, digital marketing, or languages tend to attract a loyal audience. They can be monetized through online courses, affiliate links, and sponsorships.

5. **Gaming**: 

The gaming niche continues to be profitable with gameplay videos, game reviews, and live streaming. Channels can monetize through ads, sponsorships, and merchandise.

6. **Lifestyle and Vlogging**: 

Sharing daily life, fashion, or home improvement tips has a wide audience appeal, especially with influencer partnerships and brand sponsorships.

The key is to pick a niche you're passionate about and that has potential for growth and monetization.