Add watermark to video?

Question

iOS

How do I add a watermark (text and logo) to a captured video using Swift. I've seen several questions on how to add a watermark to an image, people in the answers insert custom classes...nothing else. I can't figure out how to do it for the video, is it worth it and how to use custom classes. Thank you!

Answer 1

https://link.medium.com/at5vsuLFnR