Our creative design studio is one of the best in the world. I think we would know what the difference is between a good video and a great video. You hired us knowing we will be doing an excellent job for you guys. I think our team is very capable and would know how to create and design a lot better than what you sales staff would. Just like vice versa, your sales staff would be better at selling than my creative team.

what宾语从句引导词，这里为什么不使用that？

knowing是否做名词性宾补，如果是knowing表示“了解”，还是“熟悉”的意思？