Update send_video.py retains video coven when video is file id #155
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Summary
This PR fixes a bug where passing a file_id for video together with a cover would not attach the cover to the sent media. Previously the code converted the cover to a helper/input object but did not attach it to the media returned by utils.get_input_media_from_file_id(video, FileType.VIDEO, ...). As a result, videos sent via file_id lost their video_cover.
Root cause
When video was a local file or URL we constructed raw.types.InputMediaUploadedDocument / InputMediaDocumentExternal and set video_cover correctly.
When video was a file_id, we used utils.get_input_media_from_file_id(...) to build media but never assigned media.video_cover = vidcover_file.
note: used ai to solve this dont know if its correct or not but worked and hope problem got detected.