I don't know if using a robotic voice will de-monetize your videos....but why not keep doing what you have already been doing? You must have got 1000 subs and 4000 watch hours somehow if both your channels are monetization enabled. Do what got you here.
Also, I don't know how easy it is to upload videos with movie clips and not get copyrighted. In my short experience with movie related things, I've always had my videos copyrighted. I used to make fan-made music videos using movies that I personally enjoyed. That's how I started in youtube back in 2008 making music videos and I was getting hundreds of thousands of views but back then there was no such thing as monetization on youtube and no such thing as copyright haha. I was just doing it purely out of my passion and interest. Then when youtube became monetizable they started to flag all my music videos with this strange "matched third party content" or "copyright claim" and some became blocked in countries or worldwide and that started to discourage me and piss me off because I wasn't trying to make money, I just wanted to share my passion and hobbies with others like-minded. Ever since youtube became about money making and no longer just a site for hobbyists and fans to have community, I stopped making music videos.
