Russian fan communities are notoriously good at archiving. Groups dedicated to "Dangers in My Heart edits" often have "Exclusive" albums where they strip the audio and re-encode the video at 4K upscaled resolution using AI (Real-ESRGAN). This creates a texture that looks more detailed than the original broadcast.
To make the edit feel "exclusive," consider incorporating footage from the Special Edition Compilation Movie boku no kokoro no yabai yatsu edit exclusive