No one knows precisely how to define what a “podcast” is anymore — and debate around the topic is roiling the industry.

The term “podcast” used to refer to an on-demand audio show of people discussing things, but that definition has become blurry over time.

More than half — 52% — of people now say videos that are only available on YouTube can be considered podcasts, according to a new report by Oxford Road and Edison Research aptly titled, “What Is a Podcast? Preserving its Essence, Structuring for Expansion.”