A new year's gift to you all, through the kindness of Chris Morley: Chris has told me that Disqus has the ability to permit comments to include photos, sound, and videos. I think I have just now turned on that feature.
When you open a comment box, you should now see below it (to the left) a little icon you may click to add those forms of media to your comment, if you wish. I'm adding this feature since John Bijarney mentioned recently how useful it would be, and Chris seconded the suggestion, and then very helpfully told me that Disqus does have this feature, and all I needed to do is turn it on.
A happy 2016 to all of you!