My app did not include the Kidoz API, but I did have the youtube api within my apk package. The youtube API was not implemented in any way within my app, but it was brought in through another 3rd party package that I included and I'd just forgot to remove.
Kidoz probably have the youtube API within their API for specific functionality and hence was the reason for the suspensions. I think it's a little OTT to say that Kidoz is at blame for this as their was very little warning about this to the whole development community and you could have been suspended for even having the API (without implementing it). If the Kidoz api brings in the youtube API - this was 100% the reason for the suspension, but I'm not sure how this violates any terms.
I spoke to google and they pointed me in the direction of the youtube API being within my package and they also reinstated my app for updates - I removed the folder and released an update without any issues - visibility dropped slightly, though is rising again as you'd expect.
I strongly recommend getting in touch with google support and you should have no troubles in getting your accounts / apps un-suspended and given a chance to update them. I was in touch with support approximately 10 minutes after the suspension (it seems most were suspended within roughly the same time period) and I managed to get my suspension revoked within 24 hours. A friend of mine was in touch with support approximately 12 hours after the suspension and he is waiting to hear back from google (I'm assuming they have a huge backlog of support queries).
Personally, I think the fault lies with Google in how they've handled the recent issue, If they'd have sent out warnings prior to the suspensions - this would have been a lot less work for them and us
On a positive note though, when google do get back to you, it seems you'll more than likely have no trouble getting suspensions revoked and have chance to update your apps and get them back on the play store