I know you asked Jenn, but I thought I'd chime in. Yes, you can make sponsored videos when you are faceless and you can still make a connection with your audience. Alex Meyers is an example of a big one who has heaps of sponsorships and a loyal following because he still uses his voice and is relatable. I've also seen smaller ones do it too. Sponsors only care that you are getting good engagement of views, comments and likes. They don't care if you don't show your face