For the life of me I can't see why anyone would need picture in picture for browsers.
More features most people don't need.
Please come down to earth Mozilla.
You have lost your way.
Please revisit NCSA Mosaic and witness your roots.
(YouTube PIP is kind of difficult to discover; you have to right-click, move the mouse off the menu, and right-click again to get the native right-click menu, which is where the PIP button is.)
SymfonyCasts is an example where I like the videos. They aren't the typical YouTube style of "let me talk about random things for 5 minutes so I get this video over the 10 minute mark", they get pretty much straight to the point. They have a text version below, which also makes search easy, And you can click on any sentence in the text version to jump to the right position in the video. I found them very helpful when I started with Symfony, but haven't really watched any once I had a solid enough understanding to get work done and incrementally learn more things as I need them.
The 'failure mode' for a lazy text tutorial is that important details are left out. The 'failure mode' for a lazy video tutorial is that they didn't edit anything out.
In the end everybody eventually needs to learn from written content; not only for the viewers efficiency, but also because it's more efficient for content creators to produce written content over video content.
You can even guess your 'reckon' from looking at the kind of video content that is out there - again, this seems mostly to be a consequence of creator efficiency.
With that said, who cares?
Hell, I sometimes hit up streams - for instance, Antirez has been streaming himself building out parts of Redis 6, because it may introduce me to new techniques or minutae I didn't know. It's way, way, way more chill than reading source code, and it's a lot better than the blog post on it he probably won't write.
I wish it was a little bit easier to maximize on other monitors
instead of having to try to resize it perfectly
it allows me to size video frames arbitrarily across streaming sites like CyTube that don't support frame-out natively.
As someone who had to use mosaic and gopher and all that shit, i'd really rather not revisit it. It's nice in the way that it's sort of quaint to boot up an old workstation that has nothing but QBASIC, but it's not actually pleasant or useful.