In September of 2013 the convention San Japan, based in San Antonio, asked me if they could use a video of cosplayers that I shot at their event for advertisement and promotion, via Twitter. They did not offer to pay me, they did not offer any sort of compensation and basically just wanted a free commercial. But, I was doing this for fun outside of my normal video production job and decided to allow it if they would agree to certain things details that I wanted, essentially credit.
Specifically told them that I was having a logo/watermark commissioned at the time and when it was done I would send them a re-cut version that they could use, which you can now find here (the only one online). They decided I was not fast enough or just didn’t care in general and took my un-watermarked video that was uploaded on my Youtube channel for fun and started using it for profit as advertisement. I never even sent them the original file so they had to use a 3rd party software to rip my video off of the internet.
The first time I personally saw them using my work was December 2013 at IKKiCon in Austin, Tx. Though they may have used it before that in the time between September and December. They have also been using it since that time, the latest being Mizuumi Con in March 2014 (I was told my video was seen there at the San Japan booth).
They have been using my work uncredited and unpaid for months now and it needs to stop.