The video you linked to shows a workaround for creating new form views, wherein you can use "Manage Views" from the debug menu to change the view type to "form" after creating a temporary "tree" view.

As of the time of this answer, there is a bug in the bundled form view for creating/editing form views, "ir.ui.views form". The "type" field in the model for views has a "readonly" attribute, so you'll need to override that attribute in the form:

If you go to Settings / User Interface / Views and search for "ir.ui.view", you can correct the bug in the view quite easily. Change <field name="type"/> to <field name="type" readonly="0"/>. It should look something like this when you're done:

<?xml version="1.0"?>
<form string="Views" version="7.0">
    <sheet>
        <group>
            <group>
                <field name="name"/>
                <field name="type" readonly="0"/>
                <field name="model"/>
                <field name="priority"/>
            </group>
            <group>
                <field name="field_parent"/>
                <field name="inherit_id"/>
                <field name="xml_id"/>
            </group>
        </group>
        <notebook>
            <page string="Architecture">
                <field name="arch"/>
            </page>
            <page string="Groups">
                <field name="groups_id"/>
            </page>
        </notebook>
    </sheet>
</form>

(Bug reports relating to this issue have already been filed, such as: bugs.launchpad.net/openobject-server/+bug/1103788 )