Dear @TomSlavkovsky , here I give you the link to BMKG (Indonesia) radar data archive (also real time data included). They are in NetCDF *.gz format. Please use this link to see how the data is like, site is open (no login or payment needed).
Per Indonesian law (See Peraturan Kepala BMKG No. 20 Tahun 2014 at Pasal 4, in Bahasa Indonesia), Windy.com needs to contact and cooperate with BMKG to make use of these netCDF data in your website. Email: firstname.lastname@example.org ; email@example.com or Phone +62-21-6546315.