feat: extract avatar of the channel which added a video to a

collaborative playlist
surprisingly, innertube response contains the user's avatar, but doesn't
contain the ucid, name nor the handle

ythdd_struct_parser.py

@@ -371,6 +371,11 @@ def parseRenderers(entry: dict, context: dict = {}) -> dict:
 					author_name = ", ".join(all_authors)
 				author_ucid = safeTraverse(livm, [0, "listItemViewModel", "title", "commandRuns", 0, "onTap", "innertubeCommand", "browseEndpoint", "browseId"], default="UNKNOWNCHANNELID")
 
+			# surprisingly, innertube responds with the avatar of the user that added the video to the playlist
+			# we can extract that information, e.g. for yattee to display
+			avatar_url = safeTraverse(entry, ["playlistVideoRenderer", "thumbnailOverlays", ..., "thumbnailOverlayAvatarStackViewModel", "avatarStack", "avatarStackViewModel", "avatars", 0, "avatarViewModel", "image", "sources", 0, "url"])
+			avatars = None if avatar_url is None else ythdd_extractor.generateChannelAvatarsFromUrl(avatar_url)
+
 			return {
 				"type": "video",
 				"title": title,
@@ -378,6 +383,7 @@ def parseRenderers(entry: dict, context: dict = {}) -> dict:
 				"author": author_name,
 				"authorId": author_ucid,
 				"authorUrl": "/channel/" + author_ucid,
+				"authorThumbnails": avatars,
 				"videoThumbnails": genThumbs(video_id),
 				"index": video_index,
 				"lengthSeconds": length,