No, not currently something that is supported.

Check these threads for development suggestions:
https://retropie.org.uk/forum/topic/2250/emulationstation-fork
https://retropie.org.uk/forum/topic/4430/using-videos-in-emulation-station/
https://retropie.org.uk/forum/topic/3121/emulationstation-mod
https://retropie.org.uk/forum/topic/3566/grid-view-emulationstation-mod-ideas