If this is a reaction video, "E05" likely refers to Episode 5 of Produce 48 .
If the file is related to this, it could be a performance video or a specific "Episode" of behind-the-scenes footage from the OG School Project . 3. Gaming Content (Oyungezer) OGZ E05.mp4
"OGZ" is also the abbreviation for , a prominent Turkish gaming magazine and website. If this is a reaction video, "E05" likely