List of all libraries/components of mpv-android with their license:

• Mbed TLS: Apache-2.0 or GPL-2.0-or-later
• dav1d: BSD-2-Clause
• FFmpeg: GPL-3.0-or-later (depends on our build options)
• libxml2: MIT
• fontconfig: HPND
• freetype: FTL or GPL-2.0-or-later
• fribidi: LGPL-2.1-or-later
• harfbuzz: MIT
• libunibreak: Zlib
• libass: ISC
• lua: MIT
• libplacebo: LGPL-2.1-or-later
• curl: MIT
• libmpv: GPL-2.0-or-later (depends on our build options)
• Jetbrains kotlin-stdlib: Apache-2.0
• AndroidX (various): Apache-2.0
• Google material: Apache-2.0

Consequently mpv-android as an "entire application" falls under the terms of GPL-3.0-or-later.
(this is not legal advice)