Depends
1. If computer is part of the problem, then have an alternate streaming computer and internet connection for backup stream... which is expensive and complicated, for the most part, which is why most consumers don't do something like that. Businesses, with revenue to cover such expenses sometimes have such backups... but most do not
2. if your LAN/WAN connection is the problem, then simply an adequate alternate ISP might suffice.... but in that case, why not just drop current problematic ISP?
most effective approach - fix reason for disconnect in first place