Disney ‘s carriage fight with Google’s YouTube TV is beginning to create some issues for some of the company’s most popular media properties.

“NBC Nightly News” was able to claim victory over ABC’s ‘ World News Tonight ” last week among viewers between 25 and 54 — the demographic most coveted by advertisers. It’s the first time “Nightly” has been able to tout that distinction during the nascent tenure of its new anchor, Tom Llamas. Meanwhile, NBC’s “Today” was the most-watched morning-news program last week among viewers overall, a lead normally held by ABC’s “ Good Morning America .”

The NBC News programs were able to notch those victories in part because ABC News “retitled” the programs last week as Disney grapples with a blackout of its properties on YouTube TV . To ward of

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