Season 20 of Dancing with the Stars is currently not available for official streaming or purchase on major platforms like Disney+, Hulu, or Amazon Prime Video. There are no official locations to watch Season 20 online at this time. Some users have mentioned that older seasons, including Season 20 episodes, can sometimes be found unofficially on sites like Dailymotion, but streaming quality and availability may vary and could be subject to copyright issues. For current seasons, Dancing with the Stars airs live on ABC and is available on Disney+ and Hulu, but this does not include Season 20 which aired in 2015. In summary, there is no official legal streaming or purchase option for Dancing with the Stars Season 20 right now, and watching may require tracking down less official sources with caution about copyright and quality.