It was neutral at best, it was still a conspiracy to reduce choice in the market in a way that was beneficial to them. Yes, the excuse they used was that it prevented people from creating light bulbs that were of poor quality, and had an unpleasant color to them, but it also was profitable for them to do so.

Here’s the video you mentioned: https://www.youtube.com/watch?v=zb7Bs98KmnY