What's mean of Support for on-demand video saves？
Varia have no change
If you update the Varia Mobile App now, there are no options to set saved video length.
If you use the Varia Mobile App, looks like you start a save and it keeps saving (in 5 minute chunks) until you press stop.
Or if using the Edge, I think this is basically the film ride option. While save a clip seems to save a short clip (~2min)
