Complex sentence: Photos of the 1938 live broadcast are featured in a major article in Life (magazine) published a week later, as it was one of the first full-length plays done on live television.
Split into simpler sentences: Photos of the 1938 live telecast are featured in a major article in Life (magazine) published a week later. The event was newsworthy because it was one of the first full-length plays broadcast on live television.