YouTube daily new video email notifier

ello, I’ve had this idea in mind to build an app that notifies you via email of when a youtube channel that you’re subscribed to puts out a new content . I’m still undecided of if the notifications will be daily or when the channel puts out new content. This idea steams from me discovering that YouTube cancelled email notifications 3 months ago .

Also , I’m sure that the YouTube api has a limit of resource to be consumed by one API key . Any ideas of how to automatically enable a new user’s api key to make the call , instead of my api key ?

I'll appreciate any feedback on this idea or suggestions for ideas I can add on to this current idea.

Thanks in advance.