If I turn off chat, will I still be able to see the chat history?

I need to turn off chat, but don't want to lose access to the history (legal/HR hold). It appears that I can turn off chat by unchecking the option "Account Management" > "Account Settings" > "Team Chat" > "Security" > "Allow users to chat with others" but if I do, I want to make sure we can still search the existing chat history for the period set in "Account Management" > "Account Settings" > "Team Chat" > "Storage" > "Set retention period for messages and files in Zoom's cloud."

Can anyone confirm this?

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I am hosting a webinar and we are streaming it live on YouTube as well. 

I would like to enter all the information for YouTube ahead of time. I already scheduled a live YouTube feed. I want to add the YouTube stream key and URL ahead of time into zoom. It will be easier for my staff to go live if they don't have to enter the information, but It doesn't give me the option.

I have seen this done before.