Blocking youtube leads through Alias leads to google drive and docs inaccess
I have blocked Youtube based on alias by added IPs. But it leading to blocking google DOCs and Drive also since they are using same IP.
Are you using the DNS resolver? If so you just want to block Youtube you could put in a host override and point it elsewhere, such as a custom block page on your webserver. You could do the same thing if you are using an internal resolver, just remember to also prevent your internal hosts from using an alternate DNS server to get around it.
Google services pretty much all use the same IP addresses. If you block the IPs, then none of their services will work.