Oasis,
Of course simply words can not compete with words/photos/questions/videos
But here is another way to look at it, which I realized was the case with my kids. Children at that age are VERY FAST LEARNERS. Sometimes it takes them just a glance to learn something new. Multisensory lessons take more concentration, after all there are a few things going on -- words are shown, questions are asked, pictures and videos need to be processed.
When pattern phonics or word flash lessons are demonstrated there are words only and so it takes much faster for a child to process it, it is very much a right brain activity, so being true to right brain method you might want to consider speeding it up. I also noticed that both of my children learned from pattern phonics lesson, even if they did not seem to fully concentrate in it, and were simply glancing at the screen briefly.
When children become mobile and are walking/running around experimenting with their new gift of mobility, it is not uncommon for them to "loose interest" in stationary activities, but it is usually just for a time They are going through the stages. With my children, I simply divided lessons in smaller portions at those times and did it enthusiastically but very fast, finishing it before they wanted to be done, that way it worked as a special treat and a reward.
Also it really helps to not focus on the results, simply keeping it a joyous and fun activity.
Hope any of this helped, let us know how it is going for you!
PS. On another hand pattern phonics and word flash is the favorite part of LR for my 6 months old son. He really shows how much he loves it, which is differently from my oldest. With my second son, the secret was routine. Once it was a routine to watch the lessons, he just went with the flow.