I'm seeing a lot of improvements, so I'm going to be a little more picky than I have been on your prior posts.
First, "Indian Silent Vlog" is pretty much unreadable at thumbnail size. If you include it, and I'm not sure you need to include it, you need to make it larger. Second, "Grow Microgreens with me" is very small and could be expanded so that it covers the entire thumbnail and not just the one picture. Third, you should ensure your text is properly centered horizontally and vertically. It isn't centered vertically on "Grow Microgreens"
Channel logo is hard to read and looks out of place. If you worry about the time stamp, put it in the left corner. The text remains difficult to read. Consider darkening the background a bit more. I can barely tell that is a bell on the logo.