Here’s the video of Biden making his 98% statement:
https://youtu.be/F4r3bQ6HRrs

Interestingly, Biden appears to be on a stage with a set resembling the White House:
https://twitter.com/stillgray/status/1442999794947919879?s=21
https://twitter.com/ardubyubee/status/1443022627921186816?s=21
https://twitter.com/blockofwoods/status/1443002294379892739?s=21

I imagine the top reply sums of most of our thoughts on the subject:
“Why on earth would they stage it like this?? Totally makes me think his shot is fake too. Like his election. And presidency.”
https://twitter.com/allowme2bfrank/status/1443018856801390592?s=21