EDITIf you don't enter the captcha for a new video you won't get credit for the one you just watched
toss me a bone & try it at least once
Why would anyone watch videos, to earn some really small bitcoin dust?
The thing is, when you will even take a lot of effort to collect it, and if you are going to spend a lot of time on watching these whole videos, the payment made to you will be really small.
It is not only because of the satoshi amount per one captcha, but also because how do you collect your money- if you have many inputs and just one output, that will increase your fee dramatically, so collecting the dust lately, is not worth it at all.
Seriously, it is just better to find some even low-payed job, you will still earn more than from completing captchas.