Hi, if you don't mind to share what is the game engine you test your sprite in this video? The animations look fantastic.
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The most I think fast way to test is construct 3. Use: editor.construct.net its paid no-code engine but you can use up to 50 events absolutely free. I mean it's really free to open it anywhere anytime and drop a sprite on canvas in two clicks and test few animations. I don't recommend to use it for heavy games and animations, because they need some code to load sprites on the fly and to unload unused ones (and maybe some cache) to prevent RAM overload. But works perfectly for prototyping