YouTube channel art image size
Youtube banner or channel art looks like a cover on top of your Youtube channel and should be 2560 pixels
long by 1440 pixels tall on desktops and 640 pixels by 360 pixels tall.
Minimum image dimensions: 2048 x 1152 pixels, with an aspect ratio of 16:9. Minimum image safe area for
text and logos: 1235 x 338 pixels.
Youtube header image format
YouTube banner image should be JPG or PNG file that weighs less than 6 MB, for images with a logo or text,
it might be best as a PNG file.
Why your Youtube header image matters
YouTube banner or channel art is a small but significant tool when it comes to promoting your business,
services, or your personal brand. It’s the first thing seen by anybody who visits your Youtube channel.