Check the account before opening another app
First identify the email currently used by the SVT Play account you mean to change. SVT explains that the same account is used across SVT Play, Duo and Melodifestivalen. An email edit in a different existing account would not update the intended television profile merely because both accounts belong to the same person. Compare the address displayed in the apps before proceeding.
Use the documented Duo route
SVT’s current instructions say SVT Play itself cannot change the account email. In Duo, sign into that same account, open Profile in the bottom row and scroll down to Change beside the email address. This route is useful when the apparent absence of an edit button in SVT Play has otherwise led to repeated searching through the television’s settings.
Alternatively, find the Melodifestivalen account details
The other published route is Melodifestivalen: More, My Settings, User Details, then Change Email at the bottom. Choose one route and complete its current prompts. SVT explicitly says a change in one of these apps affects the others using the same login, so do not treat it as a contact-address edit confined to one entertainment programme.
Keep email, username and local account name distinct
SVT also distinguishes a shared username from the account name visible only to you in SVT Play. Renaming the profile therefore does not correct the address used for email sign-in codes. After an intended address change, check the account details and the destination of the next code before concluding the job is complete. Record the new address privately rather than putting a code on a shared viewing note.
Questions, answered
Can I currently edit the email inside SVT Play?
SVT directs that change to Duo or Melodifestivalen.
Does editing the same account in Duo affect SVT Play?
Yes. SVT says the email change carries across its apps using that account.