Largely, yes, and it's the fastest check available to you. If live channels play cleanly, your device, your app installation, and your connection speed have already been proven fine, which narrows the VOD fault down to the on-demand side specifically rather than anything general. VOD titles are stored files delivered in small pieces on request rather than a continuous feed, so they run through a genuinely different path on the provider's servers than live channels do. Treating a VOD fault like a live-channel fault, by restarting your router for instance, usually fixes nothing because it targets the wrong layer entirely.

A VOD file is requested in small chunks as you watch it, and if the server serving that file is under heavy load from many viewers at once, the requests for the next chunk can lag behind playback in a way that reads as buffering to you. This differs from a live stream stall, where the segment length is fixed at roughly six seconds regardless of how busy the server is at that moment. If it happens on many different titles at once rather than just one, that's server-side load, not anything wrong with your setup at home.

Individual file links can expire or break during a catalog refresh on the provider's side without affecting the rest of the library at all. This shows up as one or two specific titles that won't start while everything else in the same category plays completely normally on the same device, right next to the broken one. It's a per-title fault, and it's expected to clear itself as the catalog updates over the next day or two, rather than something you actually need to fix on your end or report as a bigger problem.

Clear your app's cached data before reinstalling anything more drastic than that. Apps cache the VOD title list and poster art locally so the menu loads faster each time you open it, and that cache going stale after a catalog update is a common cause of broken thumbnails or a catalog that looks completely empty when it genuinely isn't. Clearing cache refreshes the list against the current catalog on the server without touching your account or playlist settings in any way, so it's worth trying before anything else, including a call to support.