youtube sponsorships

I just have a question for guys here who have a lot of experience in dealing with sponsorship deals/brand deals. In two years of being a youtuber I have done deals with various brands and thankfully none of them scammed me so far. But my other channel recently reached 50k subs and it started...

Hey gents. We have a 94K channel (I rounded off wrong ) about luxury watches associated with one of our businesses. We're thinking of getting sponsors for each of our videos, where we add a 10-15 second plug after our video intro to one of their products/services similar to what Linus Tech...

does any one have successful proposal sumissions to famebit is there a chance to get sponsored from there pls share experience if you have has success there cheers