American accent shadowing videos: copy General American pronunciation, the flapped T, strong R and natural US intonation.
Every video in this collection is spoken with an American accent, so you can shadow one consistent model instead of mixing accents. Listen for the features that define General American English: the strong R after vowels, the flapped T in words like water and better, and relaxed, connected speech.
Play a sentence, repeat it immediately and copy the melody as well as the sounds. Videos range from A1 to C2, so pick your level first. Strengthen the individual sounds with the IPA pronunciation course and pronunciation exercises, or compare with the British accent collection.