Last year I worked super hard on a project called YouTube For Indies where I gathered contact information for over 1400 accounts who were more or less interested in Indie Games and or AAA titles.
The project died due to my constant lack of time to update it on a daily basis, but I found the last, updated version which was available only for my newsletter subscribers back in the day. You can check the whole Google Spreadsheet by clicking the link below!
Big YouTubers' Contacts List
However, having just the e-mails and YouTubers' Social Media channels is not enough. I've written two articles on Gamasutra which explained more thoroughly YouTube's landscape. I believe they are useful for those of you who are just starting out your Indie Development adventure or those who want to understand better how to use YouTube to its full potential.
Both articles can be found here:
Understanding YouTube #1 - Debunking myths
Understanding YouTube #2 - Evaluating YouTube Channels