hi,
i am an expert in managing youtube channels. you see my profile here: https://www.freelancer.com/u/Jls333
I know first-hand from video uploading, title and description creation, thumbnail creation, full SEO with search analytics, tag research and entry, comment filtering and response. Also, i have knowledge in TubeBuddy and VidIQ.
I manage several youtube accounts, including their social media.
All you describe above i do in a daily basis, even some graphic for thumbnail, intro, and outro.
you can discuss the price and details in chat.