Media & Galleries
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Global Gallery: worth it for serious image-heavy sites
Global Gallery is worth paying for if you need more than a basic WordPress gallery: multiple image sources, filters, collections, sliders, carousels, and a configurable lightbox in one plugin. It is not the best choice for a simple portfolio because the interface is broad, the setup takes work, and older releases had documented security issues that make prompt updates essential.
Situational
Feeds for YouTube Pro: worth it for serious video sites, not simple embeds
Feeds for YouTube Pro is worth paying for when your WordPress site needs an automatically updating YouTube channel, playlist, live-stream, or search feed with a polished gallery and caching system. It is not worth the upgrade for a basic channel grid, because the free plugin already handles channel feeds, responsive layouts, caching, and delayed player loading; the Pro value is concentrated in advanced feed types, filtering, custom post types, and agencies managing multiple sites.
Situational