Older videos should still get a few views. One of my oldest videos is still my most watched video on the channel. I need to make a proper thumbnail for it.I don't, but this is actually a pretty cool idea. It could bring some life to your older videos.
Then again, my old videos are getting literally 0 views, as they probably should. So for me it's not an option right now, but thanks for the idea. It's something that I can work on later, you know, when I've got older videos that are actually not terrible l0l