Thought I'd update this with the steps for us normal computer users, too:
Log into/create an account here: https://imgur.com/
From your profile icon at the top, go to Images
Drag and drop your images, or copy/paste them
Finally, click the image(s) you just uploaded, then copy the Direct Link (the one containing the file extension) to paste here
For videos, the steps as of writing are a bit different:
From your profile icon/section at the top, go to your Posts
Just like with images, click+drag your video onto the page, but you will get prompted to either keep or strip the audio. Click to keep the audio (if desired) to continue
If you try to do this from the Images page, it will automatically remove the audio without giving you a prompt
In my experience using Firefox on Windows, Imgur sometimes won't tell you when the video has finished uploading. The upload time varies based on the file size and your internet, obviously. If you aren't sure it has completed, give it a couple of minutes, then refresh the page to see if your video is there.
Once it's done, open the video if it isn't already. If you kept the audio, there should be a speaker icon somewhere. Click that to unmute the video and verify it has audio
Next, right-click the video, then click Copy Video Link to get the direct link
Alternatively, you can go to you Images as outlined above to copy the Direct Link
You should be able to paste the link into your post now like so, but as of writing, it will not be embedded:
https://i.imgur.com/viR5zjF.mp4