(the ones which might be called semi-academic is especially welcome)
Here are what I’ve been enjoying lately:

1.Mark Wiens

A travel youtuber who explores around the world and eats myriads of local foods.

an example: https://www.youtube.com/watch?v=Xdya8eym9nM

2. Coursera

A platform in which one can take numerous university courses, some of which are free. Just as Youtube, the subtitles make it one’s learning way more effective. I've been enjoying a photography course offered by MoMA, an American famous museum, and also one creative writing course.