There is an answer that describes how to fetch all videos from a YouTube channel here. However, in many cases, the parent account is not a channel per se, but something similar (like this is a channel, as evidenced by the "channel" word in the URL, while this one is not, since it has a keyword "c" in the URL, and not "channel"). I can still get playlists from it, and get all videos from individual playlist in that WWE account, but there are many videos in that account that are not part of any playlist listed in the account, like this).
Question - Is there a way to get all videos from an account, not just a channel or a playlist? Or is there any way to get default playlist/channel from an account where all unlisted videos such as above can be found?