Do weight loss dvds really work?

First off I'm posting anonymously because I'm so ashamed of myself!

I really just need advice and to see other people's story's.

I brought some weight loss dvds (charlotte crosby) as I'm a stay at home mum and on a tight budget so can't afford to go to the gym and there is no way I would go at the size I am anyway, i put on 3 stone after having my son and I feel disgusting! This weight is getting me down! I used to have a flat tummy! That's not the case anymore!

I feel like this could be my year as Iv honestly had enough of feeling rubbish, feeling fat and all the rest I'm just so worried I'll never get the body I want or be left with loads of loose skin on my tummy :(

Iv heard mixed reviews, some say they don't work other say there brilliant?

if I do these and add in a lot more water into my diet along with the right portion sizes and lots more veggies, surly I will loose some weight?

What should I be eating?

How big a portion size?

How long do I exercise?

When would I start to see/feel a difference?

Please give me any advice you have I don't want to be like this anymore