Aaaand their website is unusable, inconvenient to use or lacks features exactly because they want you to use their app instead.

Not like it was impossible or even too hard for Instagram or TikTok to create a proper web UI for desktop, so that you can actually enlarge the videos to full screen (I’m talking about you, horizontal videos uploaded to vertical video host, displayed on horizontal screens, making it a video for ants that takes up <12% of the screen) or set the volume. They just want you to install their app where you can do those, but also provide location info, personal files, camera and microphone.