Your connection is dropping out. Never stream over wifi. Ever. Run a network cable.
Wifi is not meant for constant-throughput bandwidth-critical applications like livestreaming; it is extremely susceptible to interference and erratic connection quality. It's meant for lightweight use by mobile devices like phones, tablets, and laptops that are being carried from room to room, where wires would be untenable. Network cables are relatively cheap, are very reliable, and most can be used to lengths around 100 meters (about 300 feet).
If a proper network cable is absolutely impossible, look into Powerline adapters instead, which act as a network 'bridge' over your home's power lines. Not as good as a dedicated network cable, but LOADS better than wifi.