Amazon cloud drive, cheap vps+owncloud, streaming video, best settings?

I have amazon cloud drive.
On it i have crypt with rclone,
rclone on cheap vps from aruba cloud mounts crypted amazon as /localACD.

Now i connect to ownloud webdav from android or ios to watch videos hosted there,
but it is very slow, before it starts i have to wait albost 1 minute,
and every rewind or sek is also very long.
What settings should i use for such environment?
now i have just rclone mount --buffer-size 128M encryptdacd: /localACD
and this /localACD is added as storage in ownloud.