The DSL technology is limited to 1 Mbits upload. 1Mbits = 1000 kbps/second = 125 kB/second.
At this speed, you will be unable to broadcast in HD. Your maximum acceptable resolution for your internet upload speed would be 640×480. In this case, Stripchat advises setting up a video bit rate of 800 kbps for 640×480 taking into account that you need a bit of bandwidth for the audio. Stripchat advises setting a 128 kbps bit rate for the audio. So, 800+128 = 928 kbps/second.
https://wiki.stripchat.com/How_to_use_OBS_studio#Output_setup
In conclusion, if you use a DSL connection, you must use a 640×480 resolution with your audio. It would be useless to buy a 1080p HD webcam since the webcam would be way too powerful compared to your internet speed.
This implies that you can only broadcast on one website at a time because you don’t have enough bandwidth. It is also time to repeat that you should use an Internet cable rather than Wi-Fi and close all your applications when you broadcast yourself.
There is one alternative that is faster than DSL. It is VDSL. VDSL or G.fast is faster than ADSL or ADSL2. In fact, it is quite all the technologies are faster than DSL and DSL2.
