The new you tube app doesn't hardly work at all on my Tivo. If it ever manages to load getting a search done is really sloooooooooooow and then the video is unwatchable due to buffering or stuttering or whatever it is called.
Welcome to the Community here and thanks for for sharing your issue here for us to see.
I'm sorry to hear that the TiVo isn't up to scratch, I'd really like to resolve this for you.
I've been into the TiVo itself and can see that things are running smoothly from this moment. I was able to see that there are some Downstream power levels are off and any Broadband that you may have in the home would be affected.
I'd like to arrange an engineer out to help look at this and possibly remedy both services. I've sent you a a 'Private Message', you can find this by clicking on the little red envelope near the top left of the page.