Besides, the acquisition of two more TV sets and video cassette players would be extremely desirable as at the moment we have great difficulty in squeezing in video lessons in the timetable having only one video classroom available.

squeezing 是动词 squeeze 的现在分词形式，squeeze 本意是"挤压、塞进"，这里引申为"勉强安排"。 in 是介词，表示"进入...之内"的意思。 squeezing in 这个短语组合起来表示"勉强安排进(时间表)"，形象地表达了在有限资源下艰难安排课程的状态。