What's up everyone? I'm still pretty new here, however I have a lot of experience with graphic design and I studied Software Development, meaning that I know how to make an interface look good. When making a thumbnail, I've put together a list of golden rules. - Consistency - Make sure each set of thumbnails is similar. For example, have the same style for a series of gameplay, or for every thumbnail for every video. - Constrast - People are naturally drawn to contrasting colours because it sticks out on the list of results. An example would be orange text on grey/black backgrounds, which is what I use. - Colour - Use bright colours for your text. This draws people into it by catching their eyes when they scroll down. Good colours to use are orange, green, pink/purple, etc. - Content - This is where you can get a little bit click-baity. If you have a video about CSGO knives, add a picture of the CSGO knife unboxing, gold "Rare Special Item" logo. Not only is it bright, but it will catch the eye of someone who knows what it means. - Creation - Make sure your thumbnails are either 720p (1280x720) or 1080p (1920x1080). I recommend 1080p. Having a low quality thumbnail is really off-putting and makes them look ugly. Keep it high resolution and high quality over all. I hope this helped some of you!