One way to hire models for your YouTube videos is to use a modeling agency or platform, such as ModelFactory.in. Here are a few steps to help you hire models for your YouTube videos on ModelFactory.in:

1. Create an account: Sign up for an account on ModelFactory.in.

2. Browse the models: Browse through the website and find models that fit your needs.

3. Contact the models: Reach out to the models you are interested in hiring through the website's messaging system or their contact information provided on the profile.

4. Negotiate the terms: Once you have found a model you would like to hire, negotiate the terms of the hire, such as the rate, the duration of the video, and any other details.

5. Hire the model: After you have agreed to the terms, hire the model and schedule the video shoot.

6. Payment: Make sure you have all the details of the payment, like the mode of payment, and keep in touch with the model throughout the process.

It's important to note that ModelFactory.in is not an agency, it is a platform that connects models with clients. It's your responsibility to check the credentials of the model you are hiring and also to verify the authenticity of the platform.