They’re a part of the Viverridae family and are related to civets, genets and them all. And Viverridae a part of Feliformia

Here a vid on them https://www.youtube.com/watch?v=8Tniytx0ow0

and more can be read here to https://animaldiversity.org/accounts/Arctictis/

Being solitary, this arboreal species spends most of the day curled up in the trees. Most activity takes place early in the morning and at dusk. Their large body sizes do not allow them to be agile enough to jump/swing between trees. Instead, binturongs climb up tree trunks with the help of their retractable claws and prehensile tail to find a branch to rest on. As previously mentioned, binturongs are usually solitary, but it is also common to observe a mate pair and their offspring living together.