I don't have any answers to these problems, and hope the tech people at NG will be able to solve these things, but thought I would share one little trick I have learned, with Judy and anyone else who has problems getting back to the right place on the page after checking out a GIF or video. I was having the same problem, and it was driving me crazy.
Here's the trick: when you want to look at a video or a GIF on the forum, Right Click on it. And when the little menu comes up, just put the GIF or video on a completely new page. When you're done, just close the page...and there you are, right where you want to be, on the same place on the page you were when you decided to look at the GIF or video.
It's magic.
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"What a wonderful morning at the pond again. It is so good to be here... on cam or in real life :o) " ~ Afke