Here’s how it works.
1. If you are not a YouTube nonprofit partner, you will need to sign up here first. If you are already a nonprofit partner go to step 2.
2. Go to "Edit Video" and fill out the fields in the section marked "Call to Action Overlay".
3. Click "Save" and voila - the overlay should appear on your video.
To kick off the new “call-to-action” tool, YouTube featured a video from charity:water on the YouTube homepage, which used a take action overlay to encourage YouTube users to donate money to build wells and provide clean, safe drinking water.
“The response from the YouTube community was overwhelming. Charity:water was able to raise over $10,000 in one day from the video. That's enough to build two brand-new wells in the Central African Republic and give over 150 people clean drinking water for 20 years, said, “Ramya Raghavan of YouTube.