The other day I was tuning around 20m and it dawned on me; those weird signals around 14.230 were SSTV signals. I don’t know why it didn’t click, because I could look it up pretty easily, but I was quickly up and decoding SSTV images.
14.230 seems to be the SSTV frequency, and 14.233 and .236 are SSTV over DRM - essentially lossless digital photo transmission. SSTV quality is at the mercy of static, etc.
I don’t have much interest in actually operating SSTV, but here’s a sample of some of the images I pulled off 20m a couple weekends ago.