Function determine_video_seek_strategy 

pub fn determine_video_seek_strategy(
    is_local: bool,
    is_hls: bool,
    needs_transcoding: bool,
    use_html5: bool,
) -> VideoSeekStrategy

Determine the video seek strategy based on stream characteristics.

This is a pure function extracted for testability.

Arguments

• is_local - Whether the file is a local download
• is_hls - Whether the stream URL contains “.m3u8” (HLS stream)
• needs_transcoding - Whether the content needs transcoding
• use_html5 - Whether frontend is using HTML5 video element