The most recent version should be 19.05.3.
In case your updater app does not offer you any further update, it seems to need updating in advance as well through the play store.
Try if updating and rebooting the system solves your video issue.
.mp4 is a video container which may hold a mpeg video codec (maybe .h264) that should generally play well on the FP2 with most players.
The file looks like being recorded with a mobile so generally also playable on such.
.TS files are so called transport stream files usually downstreamed from satellite broadcasts. Uncompressed streams requiring a bit more computing power for playback and of course space.
Well in a way, corresponding to video formats uncompressed ->compressed.