I wish ShareX was available on Linux https://github.com/ShareX/ShareX
just video is waaay better in cleanshot than it is in shareX (and a bit simpler to set up)
It doesn't as of a recent update (due to continued stability issues at Imgur). The default behavior is to not upload anymore.
Additionally ShareX pops up a big red warning telling you that you're about to upload. There are some forks (see: ShareNot) that explicitly remove any uploading, but by default there is a registry key, a setting, and a big warning that you can enable that disables uploading.
Embeddable as well. Anyone with a website should use this method so they can maximize the use of their hosting.