People who are subscribed to RLC are bound under the rules RLC posts on their site.
Example: You can pay $45 today for a Premium Membership from RLC then post an Image today, RLC can terminate your account for violating their Terms of Service. Then your out $45
A lot of people sign up for things but they never ever read the rules and guidelines.
There are other features as well at whatever you post that identifies you. There is the code in the bottom left corner and flashing dots that look like brail that appear every few seconds. Plus your computer carries a tracking cookie that RLC can identifiy you as well. RLC will run without cookies you can block RLC from your cookies and their page still runs fine.
If you can find something that extracts RAW Video you can actually get away from that code in the left corner and the brail dots. Internet download manager would do the trick but it doesn't seem to show when RLC appears. There must be away to incorporate it somehow to make it appear. That code and Brail dots is only on the player they use itself and is not part of the actual image that appears.
That's why screen recording software always picks it up because your only actually recording what's on the screen and not RAW footage.