RJIL used Jio+ for their postpaid plans right! I don't think they'll mess it by using it with OTT.
Checked some domain lookup sites. jiovoot.com is the only new domain with an age of 191 days (created on 2022-10-06). All other domain names circulating on Internet or based up on assumptions are all up for sale. So, JioVoot should be the name of new OTT platform. Unless if there's a last minute change!