Video made which is for YouTube advertising for my company

Hello
My friend has been helping me to set up a Google Performance Max campaign and I require a promotional video to be able to upload to my youtube channel.

My business is graphic design. I am looking for someone experienced in this type of video and to be able to advise on the best content etc. For example I am aware that adverts on YouTube can be skipped so the first 6seconds of the video will be important.

It needs to be available in landscape and portrait at the correct size.

I am very open to suggestions in terms of style/content. I have been advised the video should be around 20 seconds long in total.

Thank you