These are not URL's, these are domains. Let's take a look at what constitutes a URL:
https://cnn.com/electionresults/index/2020
https is the protocol
cnn.com is the domain
everything after that is a path on the domain.
In your list, everything is a domain, and these would be added to the blacklist.
r2---sn-ni5f-ttjz.googlevideo.com
r4---sn-vgqsknlz.googlevideo.com
r1---sn-ni5f-ttjs.googlevideo.com
r4---sn-ni5f-ttjz.googlevideo.com
r3---sn-ni5f-ttjz.googlevideo.com
r2---sn-ni5f-ttjs.googlevideo.com
r1---sn-ni5f-ttjz.googlevideo.com
r3---sn-ni5f-ttjs.googlevideo.com
r4---sn-ni5f-ttjs.googlevideo.com
Your best approach might be to use something that already works with Pi-hole V5. This thread may be of interest: