Grok Imagine Video 1.5 added

Added xAI's new video model, Grok Imagine Video 1.5. It creates videos from text or images up to 15 seconds long at 480p or 720p.
The model generates audio alongside the video, including speech, music, sound effects, and ambience, while synchronizing lip movements with dialogue.
Users particularly praise its speed, faithful preservation of the source image, and short-scene quality. Complex motion and voice generation can be inconsistent, so the model works best for concise clips with a clear prompt.