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What best type of video for Attract Website Visitors or promote business on youtube ?

We Design Attractive Video For your Business with Live Actors and animations.We try to increase our service abilities and product for customers. So please tell us what type of video may mostly you love and effective for a online business or website?

What best type of video for Attract Website Visitors or promote business on youtube and social media?

Is it ?

White board animation videos
Live web spokesperson video
Produc or service explainer video

please give your idea . I hope to improve my service offers to my customers as this recommendations.
Thanks