While Adobe Flash Player is reaching its end of life in just a couple of months, that doesn’t mean the Flash format itself is dead. As long as DeviantArt doesn’t allow free accounts to use proper video formats, it is worth looking at the feasibility of continuing to upload animations in Flash format. For myself, I have never used any Adobe products for creating my Flash animations. Instead, I use FFmpeg, which also includes a player that can play these animations, once they have been downloaded. An alternative player is Gnash, from the GNU project. I believe this also offers a browser plugin, or used to. Or, of course, one could start posting animations on another site. YouTube is popular, but currently I prefer Vimeo, because they seem to have a relaxed attitude to my kind of content, and also because, like DeviantArt, they allow you to re-upload revisions to your artworks.