Hi, and welcome to the forums! I will try to remember everything that I wrote in my original post, which happened to be a lot.
I will try to answer your questions to the best of my ability. It sounds like you are doing a great job with your daughter, btw.
1. It is very likely that your daughter knows most of the words on YBCR since she has been watching it for so long. My son gets bored with it too. I just show him the videos occasionally to refresh his memory, and we still do the flash cards and books from time to time. You can start showing her words that are not included in YBCR, or you can start making couplets ans short sentences with the words she has already learned. Little Reader is great for that. It is easy to make your own files, or you can download some that other people have made. Plus, we have a curriculum that covers many non-YBCR words, and also shows phonics, couplets, and eventually short sentences. These are already pre-made, so you just press play. You can see the advantages of LR over YBCR here
http://www.brillkids.com/teach-reading/advantages-of-using-little-reader.php2. Lr can be used to teach Chinese. We don't have a Chinese curriculum yet, but you can download files or make your own.
3. I would start with LM ASAP. It is good for any age, but it has been suggested that babies and young toddlers can perceive quantity, and the ability starts to diminish as they get older. LM starts off with quantity, then adds math problems, then goes to numerals. 14 months is a great time to start showing her LM.
A LM lesson is only a couple of minutes long, and a LR lesson is a few minutes long. So if you do both lessons, we're talking about less than 10 minutes. It is suggested that you do these both twice a day, but you should tailor the lessons to your child. There are some parents who break up the lessons, and others, like me, who show more than the recommended amount. It all depends on your child.
Why not try the free 14 day trial of both LR and LM? You will be able to see exactly what a lesson is like and if your daughter enjoys them. You can read more about both systems and take the trail here
http://www.brillkids.com/