Using TYPO3 8.7 core.
It seems TypoScript constant styles.content.mediatext.maxWInText
is respected for Text+Media content elements that attach images, but not for Youtube videos. A large image is scaled to that maximum width. However, a Youtube video has always maximum width 480px, even if you set the maximum width larger. Has anyone experienced this issue?
I tested it over TYPO3 9.5 and 8.7 cores.