Actually, I have never used piped and invidious to watch the videos themselves. I use them just as subscription feeds and in case I need to search for some video, then I toggle a script I have, I copy the links to the videos I want to watch and I untoggle the script. Then the links I copied start playing on mpv. I don’t like to overload piped and invidious services, which I would say is the main reason for them to be shut down, when I can watch/download the video through mpv-ytdlp on my own. Although, I don’t know if that answers your question.
Is this really a “proof”? I can’t say I’m a Signal hate, but neither a lover, however I’m not sure if signal itself explaining why signal is privacy friendly is enough to consider their service and products privacy friendly. It might just be my opinion though. Too used to companies providing equivalent arguments.
How is it so fast?