Let me help you out by giving you it in words. There is 3 main speed bridging methods but the easiest one to learn and the 1 I would go for is ninja bridging. The other two are much much more difficult and only slightly faster. With ninja building I HIGHLY suggest practicing this in a solo creative world before trying it in-game as if that’s how you try to practice it you will be falling off every few blocks.
Ok now how to do it. It’s pretty simple, you are holding shift and going to the edge of a block then you click. Simultaneously you let go of shift and continue holding the the arrows you are holding. Then you quickly shift again so you don’t fall off. Once again you click and realease shift go until your about to fall off the shift-click-unshift. Repeat this. Basiclly your traveling the length of the block at walking speed then your crouching for a very small amount of time. Just long enough to not fall off and to place another block. Repeating this after mastery, you will be twice as fast as everyone that regular bridge.
Hope this helped. Kind reguards of an experienced bedwars player, Djcougar