I am doing some research for a client who wants to know the search volume BOTH on Google and Youtube. Eg. does anyone have any idea of how to pull some search numbers exclusively on youtube searches?

I tried https://keywordtool.io/youtube but the data seem borked and totally random?

Not very helpful, but...

QuoteYoutube does not release its search volume. All the tools that claim to have Youtube's search volume are using Google's search volume and applying some algorithms to them. At Keyword Keg, we simply show you Google's raw search volume and let you decide how to compare between keywords.

https://keywordkeg.com/youtube-keyword-tool.html

https://searchengineland.com/youtube-keyword-tool-sunsets-replaced-adwords-display-planner-tool-202489

edit: added SEL link

Whilst trawling the web I found this a few days ago;

QuoteAs of March 2010, YouTube got roughly 3.7 billion search queries a month. Also, 100 hours of video are uploaded to YouTube every minute, making it one of the largest content repositories on the web.

https://blog.kissmetrics.com/social-media-and-seo/