Found Secret Hidden Keys In Hi5 Studios!

"Found Secret Hidden Keys In Hi5 Studios!" is a 12:40 minute video of Season 0 in the Project 863, which aired on April 25, 2018. In this episode, Matt finds the "863" keys in the ceiling and the brand "Sentry" is written on them.

Plot
After reviewing some footage he took for the previous episode, Matthias notices "something strange in the footage". Paul walks in and both of them analyze the footage and notice a "glint" in the ceiling. Paul sets up the ladder for Matt to go back up into the ceiling. While the original thing was just tape on a cable, Matt eventually finds a pair of keys that says "863" on it.

After cleaning up, Matt asks Mitch what he makes of the keys. He almost immediately says they look like mailbox keys. He then goes asks Gunner and he also says they look like mailbox keys.

They take a look at the second key and the brand name is "SENTRY". Gunner says that Sentry produces lockable safes because he used to own one.

Matt then shows Tanner and Michael Talamentez the keys. After pointing out that Gunner recognized what Sentry is, Tanner confirms that Sentry makes fireproof safes.

Matt then thinks that a really good person to ask about this problem is Kevin, who is unfortunately out of the office with business-related errands.

The very last thing they do is quickly look up the Sentry company on Google and confirms already what everyone has been saying.