Loading Locally External Requests

1- De register google fonts and load them locally automatically
2- De register assets from cdns and load them locally automatically
3- lazy loading all youtube and vimeo videos and replace them with thumbnails (which means 0 file loads before clicking on video)
4- Remove extra dns prefetches from header, such as:
<link rel='dns-prefetch' href='//cdnjs.cloudflare.com' /><link rel='dns-prefetch' href='//ajax.googleapis.com' /><link rel='dns-prefetch' href='//s.w.org' />

My developer is working on #3 and I have implemented successfully on a website which reduced around 40 requests. And improved a lot loading time and performance grades.

For #1 and #2 I applied manually with a customized plugin. I was able to load locally google fonts and cdn assets such as chosen.min.js , font awesome , ...

But now I'm looking for a more plug and play method. The plugin connects to api of:
https://google-webfonts-helper.herokuapp.com/

And other cdn asset websites and do all stuff automatically.

I want to know what do you think about these and are you going to add these? Will donation accelerate it?

Thanks