I tried but I failed, for now.
I looked for a subject to try that. However, I cannot seem to do it. I found a subject, set up my camera and tried that. I guess I have to look for more tutorial videos and try and try again until I can do what Swapno did.
Of note, I bookmarked his video. When I opened the link, it shows his page but the his video is content is not his. It was a video of something else I think by Xcorps. Maybe it was just a glitch.
Here is the link to Swapno's video: Shifting Focus