Connection speed in steem variable?

Hey fellas!
I live in AUT and remarked, that streaming on dTube or dLive only uses up to 10% of my available bandwith compared to regular surfing, or streaming from youtube.
I'd love to switch from YT to DT but a Video set to 720p or 1080p won't load/buffer properly.
Anyone know this problem or have a solution?

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