When I use the --album parameter, the video has no thumbnail, The --catption parameter cannot be used at the same time

[nbtu]

When I use the --album parameter, the video has no thumbnail
I tried specifying thumb_file using --thumbnail-file, but it seems that when --album parameter is used, --thumbnail-file and --catption cannot be used

if album:
 client.send_files_as_album(to, files, delete_on_success, print_file_id, forward)

I think it's a bug not to generate thumbnails under --album

In addition, I hope to use the --catption parameter under the --album parameter.
Because by default, each file comes with a catption, and in album mode, only the first file with a catption will be displayed. If there are multiple catptions, none will be displayed.
I want to modify the way album mode is displayed:
Let the individual files not have the catption parameter, and only use the catption parameter in send_file.

media = [
video1_file,
video2_file
]
entity = await client.get_input_entity(entity)
await client.send_file(entity, media, caption=caption, parse_mode="HTML")