The static and dynamic magnetic behavior of 5-nm-thick $\mathrm{C}{\mathrm{o}}_{49}\mathrm{P}{\mathrm{t}}_{51}$ films with strong perpendicular magnetic anisotropy (PMA) grown at different deposition temperatures $({T}_{\mathrm{d},\mathrm{CoPt}})$ was investigated using complementary techniques such as vibrating sample magnetometry (VSM), magneto-optical Kerr effect (MOKE) imaging, and Brillouin light scattering (BLS). Our previous study on these films demonstrated the evolution of phase transformation from an $A3$-disordered (hexagonal) to an $L{1}_{1}$-ordered (rhombohedral) structure against increasing ${T}_{\mathrm{d},\mathrm{CoPt}}$ from room temperature (RT) to 350\ifmmode^\circ\else\textdegree\fi{}C. Along these lines, the changes in the domain configuration, magnetization reversal, and spin wave behavior of the 5-nm-thick $\mathrm{CoPt}$ films due to varying ${T}_{\mathrm{d},\mathrm{CoPt}}$ are emphasized in this study. The VSM out-of-plane hysteresis loops confirmed the existence of strong PMA for all the $\mathrm{CoPt}$ films, irrespective of ${T}_{\mathrm{d},\mathrm{CoPt}}$. MOKE studies revealed that the films deposited at RT and at $150\phantom{\rule{0.16em}{0ex}}{}^{\ensuremath{\circ}}\mathrm{C}$ containing hard and soft magnetic areas, while the films grown at higher ${T}_{\mathrm{d},\mathrm{CoPt}}$, 250 and $350\phantom{\rule{0.16em}{0ex}}{}^{\ensuremath{\circ}}\mathrm{C}$, are more uniform and homogeneous. The MOKE findings are validated by the BLS spectra in terms of high and low frequency lines corresponding to the hard and soft magnetic areas, respectively. A suitable model is hypothesized to interpret the frequency variation of BLS modes corresponding to the easy saturated regions of the $\mathrm{CoPt}$ films. By this means, a good correlation between both static and dynamic behavior of the 5-nm-thick $\mathrm{CoPt}$ films has been established in this study.