I prefer to use photobucket because the picture limitation on all of these forum sites suck.
Hell, every single time I sell something I include pictures, and video when I can. Does this site allow embedding video stores on the site - No! I posted video on the operation of both power steering boxes I've sold - it gives the buyer the utmost confident they will be getting what they expect.
I post pictures in thumbnails and they expand to 1200x1600 when clicked on - details are important.
You are just running into people who either don't care, don't know or are lazy.
For example-