Instance is the word cloud infrastructure uses for a running, provisioned thing. Applied to media it reads as on-demand media compute: transcoding, streaming, rendering, packaging.
That’s a demanding technical category. Media workloads are heavier than almost anything else companies run, and the services handling them are sold to engineers who care about throughput and cost per hour rather than about branding. A name using their vocabulary lands correctly.
The singular form suits a product rather than a platform: one service, one clear function. It fits a transcoding service, a streaming infrastructure product, a rendering backend, or a media API.
There’s a plainer reading as well, where an instance is an occurrence, which suits media monitoring or clipping services that track where and when something appeared.
Two words, no hyphen, .com, and both are standard vocabulary for the intended buyer.
Offers welcome.