How removing sliders makes a site page much a faster

The template previously being used at Mittal Hair Clinic had 3 sliders and an embedded YouTube video player. This was an attractive design feature, with animations these provide. However the effect on page speed was huge.
There are several processes they use to run.

Eventually the site owner agreed to replace sliders with equally attractive images on all 3 sliders, but with the big difference that they were static images and therefore made the page much faster.

This matters even more with mobiles because the industry standard is 3 seconds to load or visitors move on.
You just cannot afford to have a big drain on your page speed if you need those enquiries.

The answer included adding a super-effective Cache  to reduce image sizes using NexGen format images.
The improved speeds were remarkable and can easily be tested with the page speed tool if you do a before and after set of readings.