Is this legal? Question about screen capturing live webcam streams

Is it legal to video capture live webcam streams of girls masturbating, saving them to video, and uploading them with watermark to tube sites?
I check a few cam sites TOS and I don't see anything mentioning it. Some cam girls have a watermark on their live stream that says "DMCA" protected.
I'm wondering if it is legal.

I have done this in the past.

None have ever been taken down.

At the beginning and end of each video i would credit the individual i captured.

Thanks for the info. The site I grab the videos from is the same site i'm promoting with the watermark.

It's a gray area? We're not attorneys - most of us anyway, so the actual legality of this practice is nothing we can advise one about. We can however say that it is a profitable model, and people do it. You'll have to sort out your own perception of morality/legality. Personally I don't think there's that much risk in it. Most sites just take down the videos you uploaded if someone claims DMCA. I can say that if there is liability as a result of this type of model - it's much more likely to be in a civil lawsuit format. That doesn't mean it wouldn't have actual real world criminal implications too ... it just means someone is a lot more likely to sue you than for you to go to jail.

Did I mention I'm not an attorney, so you shouldn't take my word for it. You should do independent research, and only take risks you are comfortable taking with your business. That way, the rest of us can stick to making the money.