you need to put the recording in the correct savegame folder, for me it's
C:\Program Files (x86)\Microsoft Games\Age of Empires II\Voobly Mods\AOC\Data Mods\WololoKingdoms\SaveGame
First make sure you have latest version of WololoKingdoms, which is 2.7.2 (can be downloaded here: https://github.com/Jineapple/WololoKingdoms/releases)
then host a room on Voobly, press 'Settings' select patch version 1.5 Beta R5, and tick the box 'mod', and then select WololoKingdoms.
Then click the tab that says 'Watch Recording', select the game file and launch.
there are probably other ways, but this works nicely for me.