(follow their posting guidelines, and for TipOfMyTongue upload to a site like Streamable/Veed.io (for video) or Vocaroo/SndUp (for audio) because video uploads aren't allowed there, and comment on your post to activate it). Source: 6 months ago

If needed you can upload to Streamable/Veed.io. Source: 6 months ago

If you would like to provide images and videos, you may use external websites such as Imgur, Gyazo and Streamable to embed links. Source: 6 months ago

Upload to youtube or streamable etc.. Source: 6 months ago

Make sure to mirror your clips. https://streamable.com and imgur.com are good ways to do that. Source: 6 months ago

That said, my kid, above all else, had the most fun with paintz.app (website), just creating pictures. He's moved onto brush.ninja now (at 7) and is doing simple gif animations. Source: over 1 year ago

I wasn't sure if that was allowed. The site is brush.ninja, I shall update the original post to show this too. Source: about 2 years ago

Https://brush.ninja/ is fast/nice if you just want to do quick stick figure type animated gifs. Start by drawing something simple in the current frame, then down at the bottom, use the "duplicate" to make the next frame and add some changes. - Source: Hacker News / about 2 years ago

I can suggest brush.ninja for online (2D) animations or OpenToonz/FlipaClip for downloadable software animations, along with Blender for 3D animations (all of these are free to download and use). Source: over 2 years ago