Here is my interaction with livecoding.tv's support about removing videos, they don't seem to like removing stuff from their website!
https://www.livecoding.tv/video/designing-a-touch-screen-int... @ 20:37
https://www.livecoding.tv/video/designing-a-touch-screen-int... @ 20:37
-- From Livecoding T&C https://www.livecoding.tv/terms/
seems from the T&C you should be able to remove or delete videos
I can delete the videos one by one though, it's just a lot of work, especially when the connection is flaky (it produces a ton of videos in that case)