1. To hire a YouTube Influencer, you can follow these steps:

1. Define your goals: Before reaching out to influencers, it's important to have a clear understanding of your goals and what you hope to achieve with the collaboration.

2. Identify the right influencer: Use platforms such as Modelfactory, AspireIQ, Influencer.co, or Traackr to search for influencers that fit your brand, have a similar audience to your target audience, and align with your goals.

3. Reach out to the influencer: You can reach out to the influencer through their social media accounts or contact them through the influencer marketing platform you are using. Be clear and specific about your goals and what you are looking for in the collaboration.

4. Negotiate the terms: Once you have established contact, negotiate the terms of the collaboration, including the budget, timeline, deliverables, and any other requirements.

5. Monitor the collaboration: Once the collaboration has begun, monitor its progress to ensure it is meeting your goals and expectations.

It's important to remember that working with influencers is a partnership, and it's crucial to build a good working relationship with them to ensure the collaboration is successful.

2. You can hire model influencers for your YouTube channel through the following platforms:

1. Influencer marketing platforms: Platforms such as Modelfactory, AspireIQ, Influencer.co, and Traackr specialize in connecting brands with influencers and can help you find and work with model influencers.

2. Social media platforms: Model influencers often have a strong presence on social media platforms such as Instagram and Twitter, where you can reach out to them directly to collaborate.

3. Modeling agencies: Some modeling agencies also represent influencers and can help you find model influencers that fit your brand.

4. Freelance websites: Websites such as Upwork and Fiverr offer a large pool of influencers that you can work with, including model influencers.

When working with model influencers, it's important to consider factors such as their reach, engagement rate, and content style, as well as your target audience and the goals of your collaboration. This will help ensure that the collaboration is a good fit and is effective in reaching your target audience.

3. You can hire YouTube Influencers through various online platforms, including:

1. Influencer marketing platforms: There are many platforms dedicated to connecting brands with influencers, including Modelfactory, AspireIQ, Influencer.co, and Traackr.

2. Social media platforms: You can reach out to influencers directly through their social media accounts on platforms such as Instagram and Twitter.

3. Marketing agencies: Some marketing agencies specialize in influencer marketing and can help you find and work with the right influencer for your brand.

4. Freelance websites: Freelance websites such as Modelfactory, Upwork and Fiverr offer a large pool of influencers that you can work with.

When working with influencers, it's important to have a clear understanding of your goals, budget, and target audience, as well as the influencer's reach, audience demographics, and content style. This will help ensure that the collaboration is a good fit and is effective in reaching your target audience.