Likely not, but you can never be sure.
.getImageData function which is used to extract canvas data in the file base.js.
This appears to check the overall brightness level of a part of the image and detects if it is "bright" or "dark".
This replaces the whole image with random gray noise and writes it back to the canvas. I suspect it's part of the code which creates the background for the "this video can not be displayed" error message.
This part of code appears twice. It checks if the first pixel of the canvas is a greyscale color.