Finally one that can download the full group of video segments being streamed in one click. Not the best interface, and it obviously has certain caveats as usual for grabbing streamed video, but it works as intended. Thanks. Tested on globoesporte.com.

After downloading several video segments, you can easily merge them all with free software like MKV Toolnix. Just get the first segment as input, then add the rest in bulk, appended to the first, in order, hit start multiplexing and you're good to go.