In terms of verbal delivery, W. C. Fields has a slower and more subtle presentation than the Marx Brothers -- subtle, but even more consistently sarcastic. Charlie Chase would fall somewhere in between these two extremes (though much lower on the sarcasm scale). In terms of character, I look to Harold Lloyd as a parallel, as both present the everyday man (though at different points in life). If Lloyd is the ordinary man as the optimistic youth who is always resilient and ready to try again, Fields is the ordinary man as the pessimistic old man who is worn down by the travails of life and his own bad decisions. Young Lloyd aspires to domesticity; old Fields once did, too, and is now trapped by it.
Another comparison can be made with Chase. While Chase's greatest emotion is exasperation, Field's greatest emotion is resentment. For Chase, his exasperation reflects his optimistic belief that things should be going better, and if he tries a little harder, they will be. For Fields, his resentment reflects a pessimistic belief that things will go badly, no matter what he does. The resentment is the last glimmer of the optimism that he once had, as he lives a life of fatalistic resignation. In spite of this, he trudges on but invests very little emotion in whether he succeeds or fails. When he finally stumbles into success at the end of the film, he rolls with it and is unchanged. The final gag is the now-loving family marveling at what a changed man he is.
Lots of verbal gags in this clip, such as his introduction to Og Oggilby, "helping" James with the car repair, Vaseline and boondoggling. Also his cod liver oil mine in Cape Cod. It should be noted that Fields used a lot of British English in his speech, an example of which was the term "shifting spanner." The British term for a wrench is/was a spanner; one that adjusted was called shifting. A shifting spanner was an adjustable wrench that Americans called a monkey wrench. No double entendre to it, just a funny sounding word (As Freud noted: "Sometimes a cigar is only a cigar.").
It should be noted that the crediting listed on this clip is incorrect. It should read Mother-in-Law (Jessie Ralph), Wife (Cora Witherspoon), Young Daughter (Evelyn Del Rio), Older Daughter (Una Merkel) & Og Oggilby (Grady Sutton). Screenplay by Mahatma Kane Jeeves (aka: W. C. Fields).