Could you be more specific about how and where you shove the screwdriver down? I have a 2003 Tundra that has a similar issue, but my fuse box is substantially different than almost every video I've found online. Mine is L-shaped with an L-shaped lid. It's all one piece. Some people have two square fuse boxes next to each other with each having its own lid. I've managed to get most of box clips to open (by destroying them) except for the last one at the mounting bracket. But I think to get to the 140A fuse on mine I have to do something similar to your video and press on some clips and push down. Nobody really shows how to press on the clips to get them to move. It isn't clear where the clips are, either. There are about 1000 different recesses inside the fuse box where you could shove a screwdriver. I do see some metal inside a few of them but there isn't really enough space to place a screwdriver, but if I happen to try, which side of the metal clip do you put the screwdriver? Do you try to push the clip to one side or the other in the slot? Or do you press straight down. If so, which side of the clip do you press down on?
