You can watch How I Met Your Mother on several streaming platforms:

• Netflix : The show is available on Netflix in many countries outside the US, including Canada, the UK, Australia, Germany, and more. If you are in a country where it is not available, you can use a VPN to access Netflix content from one of these countries

• Hulu : In the US, How I Met Your Mother is available to stream on Hulu with a subscription

• Disney+ : The series is also available on Disney+ (under the Star brand) in some regions

• Amazon Video, Apple TV, Google Play Movies, Fandango At Home : You can buy or rent episodes or seasons on these platforms if you prefer to own or rent digitally rather than stream via subscription

In summary, if you are in the US, Hulu is a straightforward option. Outside the US, Netflix or Disney+ may carry the show depending on your location. Using a VPN can help access Netflix if the show is not available in your country. Additionally, digital purchase or rental options are widely available.