Nobody else has mentioned this, so maybe it’s very particular to my set up, but when I’m importing some youtube videos, this first one shows up once in my library, the second one twice, the third one three times, etc. If I leave youtube and come back, the “counter” gets reset again and my next import only shows up once. In case it helps, for reference, I’m on a Mac (Sonoma 14.6.1), using Chrome (version 141.0.7390.123).