To be honest I haven’t ever used Viddler. I am going to go and have a look now and will let you know what I think.

On you second question; my gut response is that Youtube would be your best bet if you are wanting to ensure yourself the widest possible exposure and the biggest audience. Of course the quality of your video’s will determine how many people view them and pass them on. Youtube also seems to be the platform with the highest instances of viewer comments. It seems part of the Youtube culture, where as Vimeo and Zoopy seem to have a less ‘active’ casual audience.

Hope this helps.

Last question then, do you have any advice on which video sharing site we should go with in terms of getting people to actually watch our videos and then follow up and comment?