compress

I'd like to compress photos before uploading them to my C2 backup cloud, just like Google Photos do. Or I think they resize them. That way it will take up less space, but photos are still ok to look at. Or is it not a good idea to do that?

Is there any option to compress video or image in Moments? If I want to share a video of my kids with my mom I get a 1-minute video of 400 MB. That's of course too much.