Because thumbnails are something that came up when I asked what I can improve. And it's just my opinion. Of course I think they are good, because I know the thought process behind them. I personally know that I put as much time in to making it as was necessary.
Like I said, I don't include text or anything that can be coloured in into my thumbnails.
I know that, just the only applicable thing said so far was to add text. I really don't know how you came to such conclusions from a post with only 4, short sentences. Plus me not commenting on useful feedback doesn't mean I ignore it. I read it, and unless I have some questions about it I won't mention it, because what am I suppose to respond to it with? Just "ok"?
I have none that know about my channel.
Exactly, like I said above.
I just created a video of me playing a round of Pokémon Trading Card Game Online with a friend of mine. So what should I include in a thumbnail for that?