Check big sites example byrdie(com) look how they implement EAT strategy on their site. It is more than having faked social profiles, have comments on your post or your author name on every opost, it is more than that.
Search engines raising their standards to make our life harder it's a race.
So we are here as blackhatters and not have the money like the site byrdie to hire journalists to write for us, but we can be creative wtih this, have social shares on your site, author, comments and maybe create multiple (faked) authors when that is legit and possible.
Why you should lower your standard to win that race?
And adding academic soiurces and videos I be carefull with that, read the bing webmaster guidelines it sounds they not allowing content curation (!), so you must write or doing content curation like a journalist, do you have learned that on an journalist academy? But on the web you will find enough free stuff to learn this style of writing.
Look how the byrdie site implements other website sources in their unique written articles. Write an good unique article in journalists style (for the users) then add below the articles some sources (links) but using this sparse not heavy.
Then when you writing posts interlink them.
It looks like bing not indexing category pages so create category pages but not index them only the post url.
Best bet would be to find 3-4 writers who are not so expensive who have their own website, then order 2 articles from each writer every week, voila!
You have an author page on your site with each author and his link to his website.
Order one article for $5 from each writer every week that will be $15/ week when you have three writers, so you adding 3 good articles every week on your site as "author page", writers who have expertise in your niche. Then write yourself bigger pillar content 2x times a week and add there other expertise sources write that in journalism style (for users not academians)
Then add social shares buttons, your author profile and comments and voila! You will have a good looking EAT strategy in the eyes of the search engines. Or add a from like Hubspot is doing.
Check and study big sites how they write, their style of quality, format, then you will understand. They all have schema markup in their articles (without plugins)
Have happy sunday!