Click and wait. A 100MB file typically takes 2–5 minutes on a free tier.
When searching for "how to convert playit video to normal video online," you will see sponsored results claiming instant conversion. Be careful. Many of these sites:
How to Convert PLAYit Video to Normal Video Online Many files downloaded from Telegram or specific file-sharing networks are modified using a proprietary container system known as Smart Muxer technology. This system forces the video to lock after 15 seconds of playback on universal players like VLC or MX Player, displaying a message instructing the user to download the PLAYit app.
Some online tools don’t recognize .playit extensions. Trick them:
You may only be able to cut the video in 10-minute segments at a time.
From "Playit" to Perfect: How to Convert Those Stubborn Videos Online (No Software Required!)
The name “playit” probably came from “play it now” — ironic, because without conversion, nothing plays it at all. Now you know the fix.