I just installed 3.5 version once and don’t know which / if Standard Assets were replaced.I did not “reimport” any component or asset more than this install.
I thought it was the case (mean automatic replacement) but after all I don’t know. How to check this ?
Fact is that some of these scripts are very simple js and I don’t really see what should be “reimported”.
For example, your post would mean that var MovieTexture does not exist anymore as I also get error messages whith it (happens only when publishing Android and, still, while the script is not used in the scene)
The Standard Assets inside a project do not get replaced automatically on upgrade, because it makes no sense as this could cause sudden errors when some of the scripts change drastically.
If the Standard Assets were updated, in 3.5 you must reimport them manually