Video seo for our youtube channel

Myself and my sister have started a you tube channel. It is called 'Sisters blend it up', and we post one new video a week. So far we have uploaded 9. It is a fun show blending healthy baking - I put vegetables and healthy ingredients into cakes for kids, and Styling - my sister's eye for style help mums to style their children cheaply and easily.We are very proud of our videos and would love them to be viewed by as many people as possible. I would like to know how you will be able to improve our search engine rankings. I have heard that search engines have strict guidelines and we would need to know that you would adhere to that. Would you be able to guarantee my website will achieve number 1 ranking on google, bing and yahoo? Would you be able to share all the changes you make to our site? How do you measure the success of your SEO campaigns? How often would you feel we need to communicate? Would you be able to let me know your fees and payment terms - how much I would be charged - are you paid hourly by retainer or by project. I would also like to know what happens when we part ways- will I still maintain ownership of all optimised web content? How long will it take to see results and what results do you expect.
Thank you for your time