much 修飾動詞 通常放在哪個位置？

You often use (very much) at end of a clause:-eg:-
Do you play video game much?I don't much like playing video game at home.I don't like playing video game at home much.
Much is uncountable:-eg:-Did you get very much video game played?.. How much videogame do you play?
So much, as much, much more, and too much(as you said), are often used in positive contexts with verbs and uncountable nouns.
too much:-eg:-She played too much.
I used to play videogame so much I am tired of them. After playing the game,you try to relax as much as possible.We'll need much more money than that to build "One Belt One Road".
(Very) much is used with adj. before more and too eg:-This is much more/ too difficult----can't use (Very)
It is used:-eg:-I am very sorry.------can't use I am much sorry, Or I am sorry very much.
With some verbs with general meaning "like" very much can be used before a verb common here:-eg:-He very much enjoys playing video game.(NOT He enjoys very much playing....) I love Mary very much.
You also say:-eg:-
Thank you very much.

too much 是修飾述部played video game的（不是只修飾動詞），所以應該也只能放在句尾。

too much是嫌太多(too是依主觀的標準，用詞不精確)
very much只有表示量大而己 (講法也不甚精確，因為very是主觀的)
so much雖在心中有一個標準 ，但用詞也不精確，只有講這話的人自己知道到底是多少。
這三個詞在意義上不能標上等號。

每種語文都有它的特性和規則，既然你說出MUCH這是修飾動詞，那就必要先講出動詞才能修飾。所以不能先修飾後動詞才出現。這跟中文不同。