Subdivide an edge in Blender

Does anyone know how can I subdivide the white horizontal edge in the intersection with the 2 black vertical edges? I dont even how to ask that to youtube or google, I have been trying for literally 2 hours, thanks in advance

-- IMÁGENES ADJUNTAS --

[URL]https://docs.blender.org/manual/en/4.3/modeling/meshes/editing/edge/subdivide.html[/URL]
[URL]https://docs.blender.org/manual/en/2.93/scene_layout/object/editing/transform/move.html[/URL]
[URL]https://docs.blender.org/manual/en/4.3/editors/video_sequencer/sequencer/toolbar/blade.html[/URL]

[video=youtube_share;e0B-3ydsYIE]https://youtu.be/e0B-3ydsYIE[/video]

[QUOTE=Soliman;1027745][URL]https://docs.blender.org/manual/en/4.3/modeling/meshes/editing/edge/subdivide.html[/URL]
[URL]https://docs.blender.org/manual/en/2.93/scene_layout/object/editing/transform/move.html[/URL]
[URL]https://docs.blender.org/manual/en/4.3/editors/video_sequencer/sequencer/toolbar/blade.html[/URL]

[video=youtube_share;e0B-3ydsYIE]https://youtu.be/e0B-3ydsYIE[/video][/QUOTE]

muchisimas gracias por la ayudaaa!!!!!!!!!!!!!!!1