This week I made a bunch of minor fixes to the movie saving functionality, that was almost done last week. By that time, the movie was being saved, with correct offsets and sizes, the movie was loading but with some issues, e.g.
1. Losing the formatting of the ‘STXT’ text
2. Last few pixels of the bitmap not being saved, etc.
Fixed those one by one.
I worked with workshop movie saveMovie amongst the dictionary movies for Director 4/5 M/W (Those for Windows Director 5 are missing), made sure that that was working properly and made the pull request open for review. I am fairly confident that it should work properly but I need to make sure of that by testing with actual director targets. I’ll be doing that this week.
After this, @sev reassigned me the task of loading movie cast members. The loading of movies is already there (exactly same as the main movie) and also rendering exactly the same as filmloops (already supported in ScummVM Director). Plus the progress from the first two weeks isn’t all to waste.
However, much of the refactoring I did, separating Lingo Context Keeper from Window, had to be scrapped. @sev proposed a new solution of creating a subclass of the Window class and create the movie by passing an instance of this subclass for all the event/lingo processing. All the rendering methods will be overwritten by this subclass to do nothing. Separating all the rendering functionality from the event processing in Window will accomplish very little. Hence the workaround.
With this method, I was successful in getting the linked movie to load. However
1. It was not showing up in each frame
2. It wasn’t processing its own scripts (acting like a filmloop, looping frames)
3. It was overwriting the palette of the main movie.
To over come the 3rd problem I had to add a boolean _isCastmember to the Movie class and check it before setting the palette for the entire window. But now this results in the linked movie itself not having any palette, but I think the solution is easy, we just have to somehow set a palette for the movie’s bbox.
For the first problem, I had to write a isModified() function for the movie cast member (similar to all the other cast members) which marks the movie dirty for re-rendering.
The second problem however, was especially tricky. Because the lingo Scripting in ScummVM director is global, it only processes the scripts of the movie given by g_director->getCurrentMovie(). To solve this, I had to set the linked movie as the current movie using g_director->setCurrentMovie(_movie), before stepping its Score. 
While loading also it processes the event kEventMovieStart, where I had to make sure that the correct movie is processing the event. But finally I got movies to work with scripting (at least for my test movie).
Overall, seems I’m on track to correctly load movie cast members. This week I’ll actually test this on the ‘trektech’ target, and try to progress it as much as possible.
This week my seventh semester started. So, there was a lot of stuff with credit registration and Hostel allotment, etc. So, couldn’t give the usual amount of time to ScummVM. From next week I’ll be consistent again. I also passed my midterm evaluation this week. Thank you, @sev and everyone for helping me, would’ve been lost without them.