Why did ifixit switch to video? It's not as helpful as actual steps.

I had a Google Pixel 3 that was in a perpetual boot loop state. It would get to the splash screen, then reboot. I tried EVERYTHING. on a whim I unplugged the front facing cameras and it started normally. It's crazy that something like a camera can crash an entire system.

Ps. The plastic insert in step 19 should be given a bit more attention. If you forget to reinstall this plastic insert, the screw that you replace in that spot will instatly ruin your lcd - no matter how gently you screw it in. You'll be left with a green or pink line through your lcd. It seems worth mentioning, as I have seen this before.

Do NOT follow the author's advice to just “bend up the earpiece speaker flex”. This might work fine enough for board removal, but going backwards, you will likely rip the flex trying to jimmy it back in place. The flex is like plasticated paper ribbon. Just remove the earpiece speaker before you reassemble, and place it in its spot after you put the board back in.