Yes we are, but after the Rapture, Israel will be grafted back in.
Such an interpretation is understandable but when looked at more carefully turns out to be incorrect. You really should watch the video.
God will indeed turn back again to Israel but we are not graphed branches of Israel's Olive tree. The analogy is imperfect but essentially, we are not branches, we are the Vine, which is to say that Christ is the Vine and we are identified in Him. We have been crucified in Him and we no longer live but Christ (the Vine) lives His life through us, by faith (Gal. 2:20).
In John, Jesus states...
John 15:5 “I am the vine, you are the branches. He who abides in Me, and I in him, bears much fruit; for without Me you can do nothing."
See the difference? With Israel, the individual believer had obligations to do stuff but had to abide in the Vine to do anything. Now, in the Body of Christ, we aren't to do anything (i.e. to acquire, keep, maintain, augment or improve a relationship with God), aside from reckoning ourselves to be dead; to have died in Christ so that Christ can live His life through us. In short, under the law, you do it, under grace, Christ did/does it.
That doesn't mean that God being the vine (or tree) and we being the branches thereof isn't an analogy that works. It works, and it's not heresy to use the analogy per se, but taking the analogy too far certainly can lead to heresy, as can be seen daily on virtually every Christian television network that exists.
The bottom line is that we are NOT Israel, nor are we any part of Israel. Israel's promises were not made to, do not apply to, and cannot be claimed by those in the Body of Christ, nor would anyone who understands the differences between Israel and the Body of Christ want to do so.