When you play a downloaded HLS (HTTP Live Streaming) file, you might still see .ts (Transport Stream) and .aac (Advanced Audio Codec) requests to the server because of how HLS works. Here's why:

HLS Structure: HLS breaks media into small chunks, typically .ts files for video and .aac files for audio. Even if you've downloaded the HLS content, the player might still reference the original manifest file (.m3u8), which points to these segments.

Caching or Re-downloading: Some players might re-request segments to ensure they have the latest or most complete version of the content. This can happen even if the files are already downloaded locally.

DRM or Encryption: If the content is encrypted or protected by DRM (Digital Rights Management), the player might need to contact the server to fetch decryption keys or verify licenses, triggering additional requests.

Network Fallback: Some players are designed to check for updates or better-quality streams by default, even when playing downloaded content. This can result in .ts and .aac requests being sent to the server.

Player Behavior: Certain media players might not fully support offline playback of HLS content and may still attempt to stream segments from the original source.