List the video generation models currently active on KaiRouter (BytePlus Seedance family and others), with id, pricing, and live provider health. Call this first to find a valid model id for generate_video — model availability changes over time, so don't assume a model id without checking here.

Start an async video generation job on KaiRouter (e.g. BytePlus Seedance 2.0 / 2.0 Fast / 2.0 Mini / 1.5 Pro / 1.0 Pro — see list_video_models for the exact ids currently available). Returns immediately with a job id and status 'queued'; it does NOT wait for the video to finish. Call check_video_status with the returned id to poll until status is 'succeeded' (or 'failed'). Deducts real credits from the caller's KaiRouter account balance when the job is accepted.

Poll the status of a video generation job started with generate_video. status is one of 'queued', 'processing', 'succeeded', 'failed'. Once status is 'succeeded', video_url has the finished video. Poll every few seconds — generation typically takes tens of seconds to a few minutes depending on model and resolution.

List the caller's most recent video generation jobs (up to 50), most recent first. Useful for recovering a job id that was lost, or reviewing recent generations.