In this work the study and analysis of video recording of bending experiment of pure palladium plate and plate of $\alpha$-PdH$_{0.0071}$ at 200°C with increasing hydrogen concentration in palladium by $\Delta n$ = 0.00355$i$, where $i$ = 1, 2, 3, 4 and time graded alloys $\alpha$-PdH$_{0.00355}$, $\alpha$-PdH$_{0.0071}$, $\alpha$-PdH$_{0.0105}$, $\alpha$-PdH$_{0.0142}$, $\alpha$-PdH$_{0.0177}$, $\alpha$-PdH$_{0.0213}$ H/Pd are obtained. It is experimentally established for the first time that at 200°C with increasing concentration by $\Delta n$ = 0.00355H/Pd the maximum plate bends for the $\alpha$-PdH$_{n}$ alloy are larger than those for the pure palladium plate and are almost completely reversed in the range from 0 to 0.16 mm for both plates. In the experiments it is first recorded that at 200°C when the maximum bending of the $\alpha$-PdH$_{n}$ alloy plate is reached, a slowing down of the plate bending process is observed with reaching a plateau of duration in each experiment of 4 to 7 s. It is experimentally confirmed that at $T$ = 200°C the physical nature of the appearance in the first seconds of the maximum bending of the plate is due to the formation of temporary gradient $\alpha$-PdH$_{n}$ alloy with layers of a certain thickness that have other physical properties than pure palladium. And also, a change in the kinetics of hydrogen transport inside for the plate from the $\alpha$-PdH$_{0.0071}$ alloy, due to a change in the mechanism of distribution and occurrence of hydrogen-concentration stresses in the plate from the $\alpha$-PdH$_{0.0071}$ alloy is fixed during the formation of the maximum bend.