It will delete {count, plural, =1 {1 video} other {<x id="count"/> videos}} uploaded in this channel, and you will not be able to create another channel or account with the same name (<x id="PH" equiv-text="videoChannel.name"/>)!
As you probably noticed: creating an account is not necessary to watch video on <x id="INTERPOLATION" equiv-text="{{ instanceName }}"/>. <x id="LINE_BREAK" ctype="lb" equiv-text="<br />"/> However, creating an account on <x id="INTERPOLATION" equiv-text="{{ instanceName }}"/> will allow you to: