thanks

You'll need the ESPN app. Then sign in with your YouTubeTV login

i got it. had to start with espn app on my
tv instead of phone.

To be very specific and clear:

You use your TV Provider credentials for SECN+. In this case Yourube Live with SECN carriage. TV Provider is your media provider whether cable, satellite, or streaming.

If you also have ESPN+ you use the account credentials with ESPN+ (for me I get that through a Disney+ bundle so I use my Disney+ credentials to log into ESPN) to access ESPN+ locked content. This is an ESPN "over the top" streaming offering that includes no other ESPN content except ESPN+ marked content.