I'm new in this world and I want to speedrun escape academy on my Xbox series s and I have one question. It is necessary to have an external timer or with the in game timer is enough? If you need an external timer how do I install it on console
Although very few boards in general require external timing visible in the video, virtually none at all with in-game time or using in-game time, it'll always depend on the leaderboard specific rules. I won't assume to understand the rules of Escape Academy at a glance, but it does appear they need a timer for full-game runs, and use IGT for single-leel runs.
Ask a moderator, or in their server if they have one, if you're not sure about what a rule means or if something isn't clearly stated. Here however it looks pretty clear.