Which part of that is the clone brush?
The top two pix, #1 & #2, were all that I could find on youtube; both had unwanted writings, but in different places.
To get the initial pictures, in Windows 10, I grabbed my screen shots by pressing [logos + shift + s] in playback mode to hide youtube progress bar. Then I saved the two images in .jpg format for maximum compatibility.
Then, what I did was to transfer clean imagery from the same area in #1 to the same area in #2 which was over-written with the writing.
The result was the lower, third image, with all unwanted writing removed.
There were a few technical details; setting a convenient brush size (about half the height of the lettering in #2); and round or square brush shape; getting close-up magnification to make sure the selected pixel in #1 and #2 were the exact same pixels (I chose the lightest pixel in the angel's eye); then backing off and reducing both images to 50% of normal size to work with, and setting hardness, density, thickness, and opacity all to 100% for one-pass results.
Then you right-click on clean copy in #1 for pick-up, and left-click on the same spot in #2 for lay-down. I 'think' that's what I did; as the vintage kid's game commercial goes; "It's all in the wrist action."