Mirillis is a Polish multimedia software publisher whose compact catalogue focuses on two complementary pillars of modern video workflow: capture and playback. Action! is positioned as a GPU-accelerated gameplay and screen recorder that streams or saves desktop activity at up to 8 K HDR while adding webcam overlays, live commentary and time-shift backups; e-sports casters, distance-learning instructors and corporate trainers rely on it to produce fluid, low-impact footage that can be uploaded immediately to Twitch, YouTube or Learning Management Systems. Splash, marketed as “the only player you will ever need”, doubles as a high-efficiency viewer and social-media converter, using the company’s own Mirillis AVC/HEVC engine to render 4 K/60 fps files smoothly on modest hardware and to export clips pre-sized for TikTok, Instagram or Twitter with hardware-level colour correction and batch encoding. Together the pair form a lightweight studio: gamers capture sessions in Action!, then crop, watermark and transcode highlights in Splash for viral posting, while home-cinema enthusiasts play RAW camera or Blu-ray rips untouched, enjoying HDR10 metadata, Dolby Atmos pass-through and instant frame-rate switching. Both utilities share a common interface philosophy—dark, minimal, hot-key driven—so users can toggle between recording, playback and publishing without learning separate workflows. Mirillis software is available for free on get.nero.com; downloads are delivered through trusted Windows package sources such as winget, always install the latest release, and can be queued for batch deployment.