The sign language vid is from 2012. Here is a post about it:
https://www.jehovahs-witness.com/topic/243477/10-things-that-happened-2012-my-review
Here is a copy/quote from the post (by John Cedars/Lloyd Evans):
1st September 2012 - The viral deaf masturbation video
September 2012 was the month when one poster's observation (rebel8) turned into a viral YouTube sensation! rebel8 noticed that there was an ASL version of some of the Society's anti-masturbation material in a video that they had uploaded to their new website. Once this news spread, it prompted one YouTuber to upload a copy of the video which ended up receiving over 860,000 views before being pulled off YouTube by another Watchtower DMCA takedown notice. However, this belated action by the Society arrived too late to prevent multiple mirror videos from being produced, many of which were edited to music. The video even featured on the Comedy Central show The Burn with Jeff Ross. The whole episode showed thousands of people how ludicrous and outlandish Witness beliefs really are.
Gilbert Gonzolas of JWcrisis on youtube regularly uses it as a fake ASL interpretation of his video, which is funny I think. So check him out to see it in the corner. I do not know where else it is, but good luck hunting.
Enjoy.