Hi @Matteo Tavoletti ,
Welcome to Microsoft Q&A forum and thanks for your query.
Microsoft Stream is not a support product in Microsoft Q&A forum. For a list a Q&A supported products please refer here: Microsoft Q&A supported products
Microsoft stream has a dedicated community forum and actively answering user queries. I would encourage you to please reach out in that forum for immediate assistance: Microsoft Stream Community forum.
Hope this information helps.
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Thank you
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