No, please, not a video — this is the most inefficient way of conveying information about a product aimed at developers. Just write a well-structured text tutorial.
My guess is that is the reason we're tortured with hours long videos with very little content.
My anecdotal data point: the homepage only seemed to have a video explanation, I dropped off right then because I didn't want to watch a 2 minute video about how this works.
When I search a page I'm looking for a description and a bit of context. You might be able to search a video thanks to autotranscripts. Then you have to scrub to be sure the keyword is in the correct context.
Honestly I would like if they did both. Sometimes I like to just listen to videos while I'm doing other things and sometimes I like to be able to just skim through an article.