When adding or updating playlist entries, treat common failure causes explicitly: validate identifiers and supported URL/source formats up front, and gracefully degrade for expected runtime failures. Apply two checks: 1) Pre-validate metadata and input type - tvg-id/channel identifiers must be valid and map to an accepted channel definition (avoid “Invalid channel ID”). - Only allow supported source URL types; reject known non-accepted formats (e.g., Xtream-Codes). 2) Gracefully handle expected runtime failures - If a stream is known to fail due to policy/geo restrictions (e.g., HTTP 451), do not leave a “normal-looking” working entry. Annotate it as failing and include the reason so consumers can skip it or present it correctly. Example (m3u-style annotation): ```m3u #EXTINF:-1 tvg-id="Channel8.th",Channel 8 (720p) [Geo-blocked] # 451 Not Available Due To Legal Reasons outside of Thailand. https://example.com/geo-blocked/stream.m3u8 ``` Result: fewer avoidable errors (bad IDs, unsupported formats) and clearer, actionable behavior for unavoidable failures (explicit geo-block markers instead of silent breakage).