Hey Linded,
I just had the chance to activate Yoast Analytics on my site. I didn't seem to run into an issue having both active. It seems that I've remained logged in to both plugins, without being kicked out of one.
I did have this plugin active and connected before installing and linking Yoast analytics.
That being said, I really like the way Yoast has the authentication process set up. To my knowledge something like this isn't possible for the YouTube data API, but I am certainly going to look into how he has done it.
Anything to make the link up process easier is a win in my eyes. I feel that's the largest deterrent to using this plugin at the moment.
Thanks,
Evan