Yesterday I had the same. Kill 1 and other similar methods did nothing. My freezing sometimes was even longer. But it was like for a short time and then everything started ti work again.
The booting time of that Repl in the second video seemed to be normal. Is icons.js a really large file?
Does disabling your browser extensions help the situation?
What happens when you fork the repl, does it load there?
Try running kill 1 in the shell. Does that help in any way?
There definitely is some suspicious activity in your Repl! Whenever icons.js is open, the CPU overflows like crazy!
I’ve added myself to that Repl as a collaborator, ran a function to refresh your Repl from the root, and everything is seeming to work fine now.